Mahachai | Ehmsg2019

Varocha MAHACHAI

Department of Medicine
Division of Gastroenterology
Chulalongkorn University Hospital
Rama IV Road Bangkok , Thailand 10330

phone (662) 256-4265

fax (662) 253-8272

E-mail fmedvmc@md.chula.ac.th vmahachai@gmail.com

Place of Birth

Bangkok, Thailand

Academic Appointments

March, 1991 - Present: Associate Professor, Department of Medicine; Division of Gastroenterology, Chulalongkorn, University, Bangkok, Thailand.
July, 1985 - August, 1991: Assistant Professor, Department of Medicine, Division of Gastroenterology, University of Alberta, Edmonton, Alberta, Canada

Education

Postdoctoral Fellow in Clinical Pharmacology at University of California, San Francisco, (Supervisors: Dr. T.N. Tozer and Dr. N.L. Benowitz, July 1984 - June, 1985)
MSc Program, Department of Medicine, University of Alberta, Edmonton, Canada (Program Director and Supervisor: Dr. A.B.R. Thomson, July 1982 - June 1984)
Postgraduate Medical Training, University of Alberta, Edmonton, Canada (July 1978 - June, 1982)
Postgraduate Medical Training, Chulalongkorn University Hospital, Bangkok, Thailand (May 1976 - November 1977)
MD, Chulalongkorn University, Bangkok, Thailand (1972 - 1976)
Bsc, Chulalongkorn University, Bangkok, Thailand (1970 - 1974)
High School at Triam Udom College, Bangkok, Thailand (1968 - 1969)
Primary and Secondary School at Mater Dei School, Bangkok, Thailand (1957 - 1967)

Postgraduate Experience

August 1990-August 1991: National Research Council Fellowship, Armed Forces Research Institute of Medical Research, Bangkok, Thailand
July 1984 - June 1985:Postdoctoral Fellow in Clinical Pharmacology at the University, of California, San Francisco (Program Director - Dr. N.L. Benowitz; Supervisor - Dr. T.N. Tozer)
July 1982 - June 1984:Fellow in Gastroenterology, University of Alberta, Edmonton, Alberta, Canada. Enrolled in Msc Program supported by Alberta
Heritage Foundation for Medical Research (Supervisor - Dr. ABR Thomson)
July 1981 - June 1982:Third year Resident, Internal Medicine, University of Alberta Hospital, Edmonton, Alberta, Canada (First six months in Gastroenterology)
July 1980 - June 1981:Second year Resident, Internal Medicine, University of Alberta, Hospital, Edmonton, Alberta, Canada
July 1970 - June 1980:Rotating intern, University of Alberta Hospital, Edmonton, Alberta, Canada
July 1978 - June 1979:First year Resident, Internal Medicine, University of Alberta Hospital, Edmonton, Alberta, Canada
May 1977 - November 1977:First year Resident, Internal Medicine, Chulalongkorn, University Hospital, Bangkok, Thailand
May 1976 - April 1977:Rotating Intern, Chulalongkorn University Hospital, Bangkok, Thailand

Professional Qualifications

FRCP (C) Internal Medicine1983
FRCP (C) Gastroenterology1984
FACG 2000
American Board of Internal Medicine1982
American Board of Gastroenterology1985
Examinations: ECFMG, VQE, FLEX (California), LMCC

Teaching Experience

1990 - present: Actively involved in teaching in the Department of Medicine and Division of Gastroenterology at Chulalongkorn University Hospital Bangkok, Thailand; including bedside teaching, OPD teaching, lectures and seminars to medical students and residents in the Department of Medicine and Fellows in Division of Gastroenterology.
1988 - 1991 Member, Student Evaluation Board, Faculty of Medicine, University of Alberta
1989 - 1990 Member, Undergraduate Education Board, Faculty of Medicine, University of Alberta
1985 - 1990 Actively involved in teaching in the Division of Gastroenterology, Faculty of Medicine: Clinical Bedside Teaching (Phase III, Medical Residents), Phase II lectures and Teaching Clinic for Gastroenterology Fellows, University of Alberta
1987 - 1990 Member, Graduate Education Committee, Department of Medicine, University of Alberta
1982 - 1984 During Fellowship, assisted in teaching students and junior medical residents during their Gastroenterology rotation
1982 Senior Resident in Internal Medicine on Clinical Teaching Unit during, Third Year Residency, University of Alberta

Awards and Honours

Executive Board of Committee, The Gastroenterological Association of Thailand, 2005 - 2006
Chairperson, Liver Club of Thailand, The Gastroenterological Association of Thailand, 2005 - 2006
Chief, GI Unit, Department of Medicine, Chulalongkorn University, September 2002-present
Chairperson, Stomach Research Club, The Gastroenterological Association of Thailand, 2002 - 2004
Chairperson, Scientific Program Committee, The Gastroenterological Association of Thailand, 1992 - 2002
National Research Council Fellowship, Armed Forces Research Institute of Medical Research, "Helicobacter pylori associated gastrointestinal disorders in Thailand", Bangkok, Thailand, Aug 1990 - 1991
Visiting Assistant Professor, University of California San Francisco and Stanford Research Institute International, San Francisco, USA Project: "Colonic Drug Delivery in Experimental Colitis", October - November, 1989
Visiting Assistant Professor, Siriraj Medical School, Khon-Kaen University and Chulalongkorn University, Thailand, December, 1986
Alberta Heritage Foundation for Medical Research Fellowship, for Clinical Pharmacology training at the University of California at San Francisco, USA, July 1984 - June 1985
Canadian Association of Gastroenterology Award for the paper entitled "Comparison of Cimetidine and Ranitidine on 24 hour Intragastric Acidity and Serum Gastrin Profile in Patients with Esophagitis", presented at the Royal college of Physicians and Surgeons of Canada Annual Meeting in Montreal, September 1984
Alberta Heritage Foundation for Medical Research Gastroenterology Fellowship, University of Alberta, Edmonton, July 1982 - June 1984
Chulalongkorn University scholarships granted through University education for Outstanding Academic Performance, Bangkok, Thailand
Chulalongkorn University Medical School Medal for Overall Top Student 1976
Chulalongkorn University awards, for being top student; and individual awards for being top
student in individual subject, including Medicine and Surgery, throughout University education

Professional Asscociations

Canadian Association of Gastroenterology
American Gastroenterology Association
Thai Medical Association
Gastroenterological Association of Thailand
• Chairperson, Scientific Program Committee (1993-2002)
• Chairperson, Stomach Research Club (2002-2004)
Liver Club of Thailand
• President (2005-2006)
• Vice President (2002-2004)
Gastrointestinal Endoscopy Society of Thailand
Royal College of Physician of Thailand
• Subcommittee, Scientific Program Committee (2001-2002)
National Research Institute of Thailand
Bockus International Society of Gastroenterology

Scholarly Activities

A. Publications

1984

1. V. Mahachai, K. Walker, F. Jamali, H. Navert, D. Cook, A. Syme, A.B.R. Thomson. Comparative effect of two cimetidine regimens on 14-hour intragastric acidity in patients with asymptomatic duodenal ulcer. Clin Ther 6:(3): 259 - 281, 1984.
2. V. Mahachai, F. Jamali, A.B.R. Thomson. Effect of combination of antacid and cimetidine on 24-hour intragastric acidity in patients with asymptomatic duodenal ulcer disease. Clin Ther 6:(6): 808 - 823, 1984.
3. V. Mahachai, P. Reilly, A.B.R. Thomson. Comparative effects of pirenzepine and cimetidine, alone and in combination, on 24-hour gastric acidity in duodenal ulcer disease. Clin Ther 7:(1): 98 - 111, 1984.

1985

4. V. Mahachai, K. Walker, A.B.R. Thomson. Comparison of cimetidine and ranitidine on 24-hour intragastric acidity and serum gastrin profile in patients with esophagitis. Dig Dis Sci 1985 30:(4): 321 - 328.
5. V. Mahachai, K. Walker, H. Sevelius, A.B.R. Thomson. Antisecretory and serum gastrin lowering effect of Enprostil in patients with duodenal ulcer disease. Gastroenterology 1985 89: 555 - 561.
6. V. Mahachai, K. Walker, P. Pinchbeck, A.B.R. Thomson. Interrelationship between gastric acidity and gastrin concentration in patients with duodenal or gastric ulcer, and in healthy subjects. Clin Ther 1985 7:(4): 434 441.
7. F. Jamali, V. Mahachai, P.A. Reilly, A.B.R. Thomson. Lack of Pharmacokinetic interaction between cimetidine and pirenzepine. Clin Pharmacol Ther 1985 38: (3): 325 - 330.
8. A.B.R. Thomson, V. Mahachai. Medical management of uncomplicated peptic ulcer disease in adults. Bockus Gastroenterology, 4th Edition. W.B. Saunders Company, edited by J.E. Berk, Chapter 68, p. 1116 - 11154 1985.
9. K. Walker, B. Pinchbeck, V. Mahachai, I. Simpson, P. Kirdeikis, L. Zuk, K. Brunet, R. Sherbaniuk, L. Chitnuyanondh, R. Cherry, A.B.R. Thomson. Postprandial changes in serum, concentrations of gastrin - 17, - 34, and total gastrin in patients with duodenal or gastric ulcers and in normal subjects. Clin Ther 1985 7:(6): 704 - 716.

1986

10. R. Sherbaniuk, L.d. Jewell, W. Yacoub, B. Pinchbeck, M.L. Salkie, K. Walker, B. Pinchbeck, V. Mahachai, P. Kirdeikis, L. Zuk, M.K. Brunet, L. Chitnuyanondh, V. Manickavel, A.B.R. Thomson. Synergistic interaction between an H2 receptor antagonist and enprostil (a synthetic prostaglandin E2 on 24-hour intergastric pH, serum gastrin concentration, and tissue immunoperoxidase staining for gastrin, somatostatin and serotonin in a patient with metastatic gastrinoma. Clin Ther 1986 8:(6): 667 - 688.

1987

11. L. Jewell, W. Yacoub, M. Salkie, B. Chir, R. Sherbaniuk, K. Walker, V. Mahachai, P. Kirdeikis, I. Simpson, L. Zuk, K. Brunet, A.B.R. Thomson, V. Manivkavel, L. Chitnuyanondh. Enprostil reduces G-cell hyperplasia and hypergastrinemia in duodenal ulcer. Clin Ther 1987 9 :(3): 218-295.
12. A.B.R. Thomson, V. Mahachai. Pharmacological mangement of patients with peptic ulcer disease: Prospects for the late's 1980. Clin Invest Med 1987 10 : (3) : 152-170.

1988

13. S.M. Pond, S.A. Waschek, V. Mahachai, R.M. Fielding, D.J. Effeney, T.N. Tozer Non - linear intestinal first- pass metabolism of salicylamide in dogs after portacaval transposition. J Pharmacol Exp Ther, 1988 245:291-3.
14. V. Mahachai, B. Bedard. Update in peptic ulcer ulcer therapy. Medicine North America, 1988 19:3628-42.
15. T.N. Tozer, J. Callaway, M. Helgeth, V. Mahachai, D.J Effeney, S.M. Pond.
Concurrent determination of hepatic bioavailability of salicylamide by three techniques in the dog. J Pharm Sci, 1988 78 :462-4.
16. S.M. Pond, V. Mahachai, D.J. Effeney, T.N.Tozer. Non-linear hepatic first-pass metabolism of salicylamide in dogs after portacaval transposition. J Pharmacokinet Biopharm, 1988 16:161-4.

1989

17. V. Mahachai, Clinical pharmacokinetic considerations in gastroenterology. Modern Concepts in Gastroenterology, Vol. 2, p.129 - 58, Eldon Shaffer & Alan B R Thomson, eds., Plenum Publishing Corporation, 1989.
18. V. Mahachai, N.L. Benowitz. Drug therapy in gastrointestinal and liver diseases. In: Drug Therapy in Disease States.Williams, Brater, Mordenti, eds.,Marcel Dekker Inc, New York, 1990.
1991
19. N. Kladchareon, V. Mahachai, L. Bodhidath, P. Sampatanukul. Helicobacter pylori. Chulalongkorn Medical Journal 1991. 35(8) : 535-543.

1992

20. J.I. Macdonald, S.M. Wallace, V. Mahachai, R K Verbeack. Both phenotic and acryl glucoronidation pathways of diflunisal are impaired in liver cirrhosis Eur. J. Clin Pharmacol, 1992, 42(5); 471 - 4. 21. C. Cederberg, A.B.R. Thomson, V. Mahachai, J. Westin, P. Kirdeikis, D. Fisher, L. Zuk, B. Marriage. Effect of Intravenous and Oral Omeprazole on 24-hour Intragastric Acidity in Duodenal Ulcer Patients. Gastroenterology. 1992, 103;913-8.
22. V. Mahachai. Approach to gastrointestinal bleeding. Chula Journal of Internal Medicine 1992. 5(1) : 25-30.
23. P. Asawalertsang, V. Mahachai. Diabetic diarrhea : Pathophysiology. Chula Journal of Internal Medicine 1992. 5(1) : 47-50.

1993

24. V. Ratanakamut, V. Mahachai, S. Isarasena. Helicobacter pylori. Chula Journal of Internal Medicine 1993. 6(2) : 4-13.

1994

25. P. Tangsavivat, V. Prasithsirikul, N. Vanitniramol, T. Tanvichian, T. Indharakamtornchai, V. Mahachai. Splenic abscess. Chula Journal of Internal Medicine 1994. 7(3) : 123-128.

1995

26. A.B.R. Thomson, V. Mahachai. Effect of Nizatidine and Ranitidine on 24 - hour Intragastric pH, Pepsin, PGE 2 and Serum Gastrin Concentrations in Healthy Volumteers. J. of Gastroenterology and Hepatology. 1995 Sep-Oct, 10(5):546-54. 27. F. Jamali, A. Thomson, P. Kirdeikis, M. Tavernini, L. Zuk, B. Marriage, I. Simpson, V. Mahachai. Diurnal Variation in the Pharmacokinetics of Nizatidine in Healthy Volumteers and in Patients with Peptic Ulcer. J. of Clinical Pharmacology. 1995 Nov, 35(11) : 1071-5.
28. S. Anuras, V. Mahachai. Acute Colonic Pseudo-Obstruction (Ogilvie's Syndrome). The Thai Journal of Gastroenterology. Vol. 1 No. 1. 1995 July-September : 27-34.
29. V. Mahachai, P. Komolmit, N. Kladchareon, P. Kullavanijaya. Helicobacter pylori Eradication and Reinfection Rate Followed by 13C - Urea Breath Test. The Thai Journal of Gastroenterology. Vol.1 No. 2. 1995 October-December : 91.
30. V. Mahachai, A. Sriratanaban, T. Chaiwatanarat, S. Anuras, P. Kullavanijaya. Gastric Emptying Time and CLO-Test in Patient with NUD : Effect of Cisapride. The Thai Journal of Gastroenterology. Vol.1 No. 2. 1995 October-December : 96.

1996

31. N. Wannachai, V. Mahachai, S. Wittayalertpanya. Pharmacotherapy of Helicobacter pylori Associated Peptic Ulcer Disease. Chulalongkorn Medical Journal 1996. 40(6) : 441-449.
32. AB.R. Thomson, V. Mahachai, R.J. Bailey, P. Kirdeikis, L. Zuk, B. Marriage, I. Simpson, F. Jamali. Twice Daily Nizatidine of Ranitidine is Superior to Once Daily Dosing in Elevating 24H Intragastric pH in Patients with Duodenal Ulcer Disease. J. of Gastroenterology and Hepatology. Vol. 11 No. 12. 1996 December : 1171-1176.
33. T. Chaiwatanaral, V. Mahachai, N. Kladchareon, P. Kullavanijaya, A. Sriratanaban, S. Isarasena. Gastric emptying time : a comparison between geometric mean and left anterior oblique methods. Chulalongkorn Medical Journal 1996. 40(12):979-987.

1997

34. Sinn Anuras, Mark B. Taylor, V. Mahachai. Pseudo-Obstruction Syndrome. Gastrointestinal Emergencies, 2nd Edition, Williams & Wilkins, A Waverly Company editor by Mark B. Taylor, Section 6, 1997 : p. 537 - 550.
35. U. Wongklaw, V. Mahachai, S. Boonyaratanavej, P. Moonla-or. Hypereosinophilic syndrome. Chula Journal of Internal Medicine 1997. 10(6) : 175-181.

1998

36. P. Wongkusoltham, P. Kullavanijaya, V. Mahachai. In Vitro Metronidazole Resistance and Eradication of Helicobacter pylori in The Thai Patients with Peptic Ulcer Disease. Gastroenterology 1998. 114(4) : A333.
37. V. Viriyautsahakul, P. Suwannakul, T. Tirawatnapong, S. Israsena, V. Mahachai. Correlation Between Serum Quantitative Hepatitis C Virus Ribonucleic Acid Levels by Polymerase Chain Reaction and Liver Histologic Activities. Gastroenterology. 1998 114(4) : A1361.

1999

38. P. Tangkijvanich, S. Wittayalertpanya, T. Kusonsolboon, D. Thong-ngam, V. Mahachai. Caffeine Clearance Study in Hepatocellular Carcinoma. Journal of the Medical Association of Thailand. 1999 March ; 82 (3) : 297-303.
39. Y. Poovorawan, V. Mahachai, P. Maireang, C. Pramoolsinsap, A. Jutaphuti, T. Tanwandee. Research Strategy : Disease of the Liver. Strategic Plan for Health Research, Thailand 1999 : An English Abstract. 1999 July : 42-43.
40. V. Mahachai, P. Tangkijvanich, N. Wannachai, P. Sampathanukul, P. Kullavanijaya. Cag A, Vac A : Virulence factors of Helicobacter pylori in Thai patients with Gastroduodenal Diseases. Helicobacter. 1999 September ; 4 (3) : 143-147.
41. P. Tangkijvanich, D. Tresukosol, P. Sampattanukul, S. Sakdikul, N. Voravud, V. Mahachai, A. Mutirangura. Telomerase Assay for Differentiating between Malignancy-related and Nonmalignant Ascites. Clinical Cancer Research. 1999 September ; 5 : 2470-2475.
42. R. Vilaichone, V. Mahachai. Acute Acalculous Cholecystitis in Leptospirosis (Case Reports). Journal of Clinical Gastroenterology. 1999 October ; 29 (3) : 280-283.

2000

43. S. Wittayalertpanya, N. Wannachai, P. Thongnopnua, V. Mahachai. Effect of Omeprazole on Gastric Mucosa and Serum Levels of Amoxicillin in Patients with Non-Ulcer Dyspepsia. 2000 June ; 83:611-618.
44. V. Mahachai, C. Kositchaiwat , U. Kachintorn , B. Ovartlarnporn, P. Mairiang , S. Anantapunpong S. Epidemioloy of Helicobacter pylori Infection in Thailand. Helicobacter Research. Journal of Helicobacter Research. 2000 ; 4 (1) : 25-29.
45. S. Manotaya, V. Mahachai, S. Isarasena, P. Suwannakul. Oral Sultamicillin in the Treatment of Spontanous Bacterial Peritonitis. ( in preparation) 46. P. Tangkijvanich, V. Mahachai, S. Wittayalertpanya, V. Ariyawongsopon, S. Isarasena, Shor-term effects of Branched-Chain Amino Acids on Liver Function Tests in Cirrhotic Patients. South East Asia Journal of Tropical Medicine and Public Health. (accept for publication).
47. R. Vilaichone, P. Kullavanijaya, V. Mahachai. Delayed Presentation of Diaphragmatic Rupture after Minor Abdominal Injury (case reports). Journal of Trauma. (in preparation)
48. R. Vilaichone, V. Mahachai. Tuberculous Acalculous Cholecystitis with Cholestasis (case report). Journal of Clinical Gastroenterology. (submitted for publication)
49. V. Mahachai, P. Tangkijvanich, N. Wannachai, P. Sampatanukul, K. Lertpocasombat, N. Kladchareon. Serodiagnosis of Helicobacter pylori Infection by Immunoblot Assay. Asian Pacific Journal of Allergy and Immunology 2000 Mar;18(1):63-7.
50. V. Mahachai, D. Thong-ngam. Functional Dyspepsia. Gastrointestinal Motility (GI Motility Club Thailand) 2000 ; 273-284.
51. V. Mahachai, P. Naprasert. Irritable Bowel Syndrome. Gastrointestinal Motility Motility (GI Motility Club Thailand) 2000 ; 285-305.
52. K.M. Fock, P. Chelvam, S.G. Lim, and the South-East Asia Multicentre Study Group (Mahachai V.). Triple therapy in the eradication of Helicobacter pylori in patients with duodenal ulcer disease: results of a multicentre study in South-East Asia. Aliment Pharmacol Ther 2000; 14: 225-31.

2001

53. R. Vilaichone, V. Mahachai. Current management of Helicobacter pylori Infection. Journal of The Medical Association of Thailand. 2001 ; 84 Suppl. 1 : S32-S38.
54. S. Wittayalertpanya, V. Mahachai. Caffeine Clearance in Patients with Chronic Viral Hepatitis : Before and after Interferon Therapy. Journal of The Medical Association of Thailand. 2001 ; 84 Suppl. 1 : S189-S196.
55. R. Vilaichone, V. Mahachai, S. Eiam-ong, P. Kullavanijaya, N. Wisedopas, P. Bhattarakosol. Necrotizing Ileitis Caused by Cytomegalovirus in Patient with Systemic Lupus Erythematosus : Case Report. Journal of The Medical Association of Thailand. 2001 ; 84 Suppl. 1 : S469-S473.
56. P. Wongkusoltham, V. Mahachai, R. Vilaichone, P. Kullavanijaya, K. Phaosawadi. Eradication Rates of Helicobacter pylori Between Metronidazole-Sensitive and Metronidazole-Resistant Strains with Metronidazole Containing Regimen in Thai Patients With Peptic Ulcer Disease. Journal of The Medical Association of Thailand. 2001 ; 84 Suppl. 1 : S474-S480.
57. V. Mahachai, R. Vilaichone. Malignant Duodenal Stromal Tumor : The First Case Report in Thailand and Review of the Literature. Journal of The Medical Association of Thailand. 2001 ; 84 Suppl. 1 : S481-S484.
58. Vilaichone RK, Mahachai V., Wisedopas N. Duodenal Helicobacter pylori associated with duodenal ulcer dependent of gastric Helicobacter pylori status (abstract). American Journal of Gastroenterology 2001; 96(9); S78.

2002

59. P. Kullavanijya, R. Vilaichone, V. Mahachai. Helicobacter pylori diagnosis in bleeding peptic ulcer disease, Journal of Internal Medicine of Thailand, Apr-Jun 2002, 18:195-199.
60. Yamaoka Y, Orito E, Mizokami M, Gutierrez O, Saitou N, Kodama T, Osato MS, Kim JG, Ramirez FC, Mahachai V., Graham DY. Helicobacter pylori in North and South America before Columbus. FEBS Lett. 2002 Apr 24;517(1-3):180-4.
61. V. Mahachai, B. Yacyshyn, A.B.R. Thomson. Protonpump Inhibitors in the Treatment of Duodenal Ulcer Disease. Proton Pump Inhibitors : From Molecular Biology to Clinical Practice. Basic and Clinical Pharmacology. Karger Medical and Scientitific Publishers. [in print] 2002.
62. Vilaichone RK, Mahachai V, Kullavanijaya P, Nunthapisud P. Spontaneous bacterial Peritonitis caused by Streptococcus bovis: case series and review of the literature. Am J Gastroenterol 2002 Jun;97(6):1476-9.
63. Rerknimitr R, Attasaranya S, Kladchareon K, Mahachai V. Kullavanijaya P. Feasibility and complications of endoscopic biliary drainage in patients with malignant biliary obstruction at King Chulalongkorn Memorial Hospital. Journal of The Medical Association of Thailand. 2002 Jun:85 Suppl 1:S48-53.
64. Tangmankongworakoon N, Vilaichone RK, Kullavanijaya P, Mahachai V. The effect of blood on rapid urease test for Helicobacter pylori detection : an in vitro study. Journal of The Medical Association of Thailand 2002 Jun;85 Suppl 1:S70-3.
65. Vilaichone RK, Mahachai V, Tumwasorn S, Kullavanijaya P. Gastric Juice urease test and brushing urease test for Helicobacter pylori detection. Journal of The Medical Association of Thailand 2002 Jun;85 Suppl 1:S74-8.
66. hone RK, Mahachai V, Tumwasorn S, Nunthapisud P, Kullavanijaya P. Inhibitory effect of Lactobacillus acidophilus on Helicobacter pylori in peptic ulcer patients: in vitro study. Journal of The Medical Association of Thailand 2002 Jun; 85 Suppl 1: S79-84.
67. Vilaichone RK, Mahachai V, Tumwasorn S, Nunthapisud P, Wisedopas N, Kullavanijaya P. Duodenal Helicobacter pylori associated duodenal ulcer depend on gastric Helicobacter pylori status. Journal of The Medical Association of Thailand 2002 Jun;85 Suppl 1:S97-102.
68. Mahachai V, Vilaichone RK, Kullavanijaya P. Diagnosis method of Helicobacter pylori infection in bleeding peptic ulcer. Journal of The Medical Association of Thailand. 2002 Jun;85 Suppl 1:S103-8.
69. Thong-Ngam D, Thumvijit L, Tangkijvanich P, Janchai A, Mahachai V, Wittayalertpanya S. Caffeine clearance in patients with hepatocellular carcinoma after transcatheter oily chemoembolization treatment. Journal of The Medical Association of Thailand 2002; Dec 85 (12): 1280-7.

2003

70. Tangkijvanich P, Suwangool P, Mahachai V. Comparison of clinical features and survival of patients with hepatitis B and hepatitis C associated hepatocellular carcinoma in Thailand. Journal of The Medical Association of Thailand. 2003 Jun;86 Suppl 2:S250-6.
71. Vilaichone RK, Vilaichone W, Tumwasorn S, Suwanagool P, Wilde H, Mahachai V. Clinical spectrum of hepatic tuberculosis : comparison between Immunocompetent and immunocompromised hosts. Journal of The Medical Association of Thailand. 2003 Jun; 86 Suppl 2:S432-8.
72. Tangmankongworakoon N, Mahachai V, Thong-Ngam D, Vilaichone RK, Tumwasorn S, Kullavanijaya P. Pattern of drug resistant Helicobacter pylori in dyspeptic patients in Thailand. Journal of The Medical Association of Thailand. 2003 Jun;86 Suppl 2:S439-44.
73. Luangjaru S, Ruxrungtham K, Wisedopas N, Mahachai V. D-xylose absorption in non- chronic diarrhea AIDS patients with the wasting syndrome. Journal of The Medical Association of Thailand. 2003 Jun; 86 Suppl 2:S477-83.
74. Tangkijvanich P, Kongtawelert P, Pothacharoen P, Mahachai V, Suwangool P, Poovorawan Y. Serum hyaluronan: a marker of liver fibrosis in patients with chronic liver diseases. Asian Pacific Journal of Allergy and Immunology 2003 Jun; 21(2) : 115-20.
75. Cooksley WG, Piratvisuth T, Lee SD, Mahachai V, Chao YC, Tanwandee T, Chutaputti A, Chang WY, Zahm FE, Pluck N. Peginterferon alpha-2a (40 kDa) : an advance in the treatment of hepatitis B e antigen-positive chronic hepatitis B. Journal of Viral Hepatitis. 2003 Jul; 10(4):298-305.
76. Vilaichone RK, Mahachai V, Kositchaiwat C, Graham DY, Yamaoka Y. Relation between seroreactivity to low-molecular-weight Helicobacter pylori-specific antigens and disease presentation. Clinical and Diagnnostic Laboratory Immunology. 2003 Nov;10(6):1025-8.

2004

77. Tangkijvanich P, Mahachai V, Suwangool P, Poovorawan Y. Gender difference in clinicopathologic features and survival of patients with hepatocellular carcinoma. World J Gastroenterol. 2004 Jun 1;10(11):1547-50.
78. Rerknimitr R, Kladcharoen N, Mahachai V, Kullavanijaya P. Result of endoscopic biliary drainage in hilar cholangiocarcinoma. J Clin Gastroenterol. 2004 Jul;38(6): 518-23.
79. Vilaichone RK., Mahachai V, Tumwasorn S., Wu JY., Graham DY., Yamaoka Y. Molecular Epidemiology and Outcome of Helicobacter pylori in Thailand Cultural Cross Roads. Helicobacter. 2004 Oct; 9(5): 453-9.

2005

80. Tangkijvanich P, Mahachai V, Komolmit P, Fongsarun J, Theam