Education

• High school : Assumptoin College, Graduated 1958
• University : Chulalongkorn University 1958-1960
• Medical School : Siriraj Hospital 1960-1964
• Internship : The Jewish Hospital of Brooklyn 1965-1966
• Residency in Medicine : The Veterans Administration Hospital of Brooklyn 1966-1968.
• Fellowship in Gastroenterology : The Veterans Administration Hospital of Brooklyn, NY.1968-1969.
• Fellowship in Hepatology : The Veterans Administration Hospital of Boston 1969-1970 (Professor H. Zimmerman).
• Fellowship in Hepatology : Yale University School of Medicine 1970-1971 (Professor Gerald Klastkin).
  

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Certified

• American Board of Internal Medicine, 1971
• Fellow American College of Physician, FACP, 1980
  

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Academic Position

• Assistant Professor of Medicine 1975-1978
• Associated Professor of Medicine 1979-1985
• Professor of Medicine 1985-2009
• Emeritus Professor of Medicine 2009 - present
  

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Honorary Position   

• Honorary Fellow of The Royal Australasian College of Physicians
• Honorary Fellow of The Academy of Medicine, Singapore
• Honorary Fellow of The Royal College of Physician, London
• Honorary Doctorate in Medicine, Mahidol University 2012
  

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Position

• Secretary General Asian Pacific Association for the study of the liver (APASL) 1978-1980
• Secretary General Scientific Meeting Asian Pacific Association for the study of the liver (APASL) Bangkok, January 1984
• Treasurer The Royal College of Physician of Thailand since 1986 -2003
• President Gastroenterological Association of Thailand 1986-1988, 1990-1992
• Secretary General Asian Pacific Association of Gastroenterology 1992-1996
• Treasurer Asian Pacific Association of Gastroenterology 1996-2000
• President World Congress of Gastroenterology, Bangkok 2002 (from 1998-2002)
• Chairman of Liver Club of Thailand 2003
• Vice President The Royal College of Physician of Thailand 2003-2004
• President The Royal College of Physician of Thailand 2004-2006
• Treasurer  Liver society (Thailand) 2006
• Chairman, saving Liver society (Thailand) 2006 - 2010
• Chairman The Liver Foundation of Thailand