Credentials MBBS (Singapore) 1973, MRCP (Int Med) (UK) 1979, FAMS (Gastroenterology) 1983, FRCP (Int Med) (Edin) 1990, FRCP (Int Med) (Lond) 1992
Language English, Bahasa Melayu, Bahasa Indonesia, Hokkien Dialect, Hakka

Graduated MBBS from the National University Of Singapore in 1973. Trained in gastroenterology in
UK (Oxford). Member of the Royal Colleges of Physicians of the United Kingdom.(1979), Fellow of
the Academy Of Medicine Singapore (Gastroenterology) (1983). Fellow of the Royal Physicians of
Edinburgh (1990) and London.(1992). Was a faculty member of the Department of Medicine,
National University Of Singapore from 1983 – 1995. He was made Associate Professor 1990.
He has collaborated on many international studies on heparitis B and hepatitis C treatment using
pegylated interferons, lamivudine, and combination therapies and his current research interests
include chronic hepatitis B and C infections, drug induced liver injuries, autoimmune hepatitis, liver
cancer, irritable bowel syndrome, and ulcerative colitis and related disorders.
Dr Guan was consultant and advisory board member in the field of viral hepatitis research studies
for international pharmaceutical companies involved in the manufacture of drugs used for
atitis B treatment


Dr Guan has published more than 100 scientific articles, more than 150 abstracts and several
chapters of books. He was an editorial board member of Hepatology International, Hepatitis
World, Digestive Tract, and the Bangladesh Journal of Gastroenterology and the editor-in-chief of
Management of Common Gastroenterological Problems: A Malaysia & Singapore Perspective, a
book on local gastroenterological problems. He served on several editorial committees of
journals, newsletters and drug directories both locally and regionally. He is a reviewer for the
Journal of Gastroenterology and Hepatology, Journal of Viral Hepatitis, Alimentary Pharmacology
and Therapeutics, and Hepatology International, International Journal of Hepatology among


He is widely recognized as an expert in the field of viral hepatitis in the Asia Pacific region and has
regularly been invited to give talks on viral hepatitis and liver diseases at both local and regional
conferences. Besides being a part-time lecturer to several organisations in Singapore, Dr Guan has
been a member of teaching faculties in local and regional scientific meetings. He organizes
and/or.assists in numerous national and regional scientific meetings for physicians as well as
educational meetings for the public. He lectured extensively at seminars, study groups, and to
general practitioners locally as well as regionally.
Member of Parkway International Ethics Committee (Parkway Health Care).
Previous positions:*Member, Singapore Medical Council. *Member,National Advisory and
Scientific committee on Hepatitis and related disorders (Ministry of Health. ) *Member,Medicines
Advisory Committee (Health Science Authority). *Member, Gastroenterology Specialist Training
Committee,(Ministry of Health). *Member, National Advisory Committee on Transplantation
(Ministry of Health). * Member, Hepatobiliary Subcommittee of the National Committee on
Cancer Care.


Member of regional and international professional organizations like the Asia Pacific Association
for the Study of Liver Diseases (APASL), European Association for the Study of the Liver (EASL),
British Society of Gastroenterology (BSG). He has served in several APASL working committees on
management guidelines for chronic hepatitis B and chronic hepatitis C infections in the region.
Currently serves as a taskforce member in APASL. Was a member of the Asia Pacific Hepatitis B
Management Advisory Board.