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Asian Pacific Journal of Allergy and Immunology|December 1, 1989
Immunogenicity of a low dose recombinant DNA hepatitis B vaccine in healthy adults in SingaporeR Guan, H H Tay, I Yap, et al.Journal of Gastroenterology and Hepatology|July 1, 1992
Inflammatory bowel disease: an uncommon problem in SingaporeC C Tan, J Y Kang, R Guan, et al.Gut|February 1, 1989
Acid induced duodenal ulcer pain: the influence of symptom status and the effect of an antispasmodicJ Y Kang, I Yap, R Guan, et al.Annals of the Academy of Medicine, Singapore|October 1, 1983
The influence of sex, race and dialect on peptic ulcer and non-ulcer dyspepsia in SingaporeJ Y Kang, R Guan, S J LaBrooy, et al.Annals of the Academy of Medicine, Singapore|November 1, 1990
Hepatitis B vaccination in chronic renal failure patients undergoing haemodialysis: the immunogenicity of an increased dose of a recombinant DNA hepatitis B vaccineR Guan, H H Tay, H L Choong, et al.Singapore Medical Journal|June 1, 1991
The diagnostic yield of upper gastrointestinal endoscopy in the investigation of anaemiaC C Tan, R Guan, H H Tay, et al.Transactions of the Royal Society of Tropical Medicine and Hygiene|September 1, 1991
Horizontal or vertical transmission of hepatitis B virus? A serological survey in family members of hepatitis B carriers in SingaporeC C Tan, R Guan, I Yap, et al.Alimentary Pharmacology & Therapeutics|October 1, 1996
Subcutaneously administered recombinant human beta-interferon in the treatment of chronic hepatitis B virus infectionR Guan, K G Yeoh, I Yap, et al.Annals of the Academy of Medicine, Singapore|January 1, 1989
Evidence of viral replication in HBsAg positive patients with hepatocellular carcinoma: measurement of serum hepatitis B virus deoxyribonucleic acid (HBV-DNA)R Guan, I Yap, L Wong, et al.Pageof 15