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| | Issue Date | Title | Author(s) |
| 1 | 1990 | Antibody to herpes simplex virus type 1 in peptic ulcer patients | Kang, J.Y. ; Lee, T.P. ; Guan, R. ; Tay, H.H. ; Yap, I. ; Math, M.V. |
| 2 | 1995 | Chili protects against aspirin-induced gastroduodenal mucosal injury in humans | Yeoh, K.G. ; Kang, J.Y. ; Yap, I. ; Guan, R. ; Tan, C.C.; Wee, A. ; Teng, C.H. |
| 3 | 1991 | Chronic hepatitis B infection in Singapore. | Yap, I. ; Wee, A. ; Guan, R. |
| 4 | 1990 | Comparison of culture and histology for the identification of Helicobacter pylori in endoscopic biopsies. | Yap, I. ; Kung, J.S.; Wee, A. ; Tay, H.H. ; Guan, R. ; Ho, B. ; Kang, J.Y. |
| 5 | 1991 | Cytological diagnosis from fine needle aspiration biopsy of the liver. | Wee, A. ; Nilsson, B. ; Chan-Wilde, C.; Yap, I. ; Guan, R. |
| 6 | 1990 | Effect of colloidal bismuth subcitrate on symptoms and gastric histology in non-ulcer dyspepsia. A double blind placebo controlled study | Kang, J.Y. ; Tay, H.H. ; Wee, A. ; Guan, R. ; Math, M.V. ; Yap, I. |
| 7 | 1990 | Endoscopic retrograde cholangiopancreatography and endoscopic sphincterotomy--a Singapore experience. | Yap, I. ; Guan, R. ; Kang, J.Y. |
| 8 | 1990 | Helicobacter pylori and gastritis in patients with peptic ulcer and non-ulcer dyspepsia: Ethnic differences in Singapore | Kang, J.Y. ; Wee, A. ; Math, M.V. ; Guan, R. ; Tay, H.H. ; Yap, I. ; Sutherland, I.H. |
| 9 | 1993 | Hepatitis a sero-epidemiology in Singapore: A changing pattern | Yap, I. ; Guan, R. |
| 10 | 1993 | Hepatitis a sero-epidemiology in Singapore: A changing pattern | Yap, I. ; Guan, R. |
| 11 | 1990 | Hepatitis B vaccination - The present status | Yap, I. ; Guan, R. |
| 12 | 1990 | Hepatitis B vaccination - The present status | Yap, I. ; Guan, R. |
| 13 | 1990 | Hepatitis B vaccination in chronic renal failure patients undergoing haemodialysis: The immunogenicity of an increased dose of a recombinant DNA hepatitis B vaccine | Guan, R. ; Tay, H.H. ; Choong, H.L.; Yap, I. ; Woo, K.T. |
| 14 | 1991 | Hepatitis B vaccination: Half dose recombinant DNA hepatitis B vaccine (B-Hepavac II) is as immunogenic as the full recommended dose in healthy adults | Guan, R. ; Yap, I. ; Tay, H.H. |
| 15 | 1991 | Hepatitis B vaccination: Half dose recombinant DNA hepatitis B vaccine (B-Hepavac II) is as immunogenic as the full recommended dose in healthy adults | Guan, R. ; Yap, I. ; Tay, H.H. |
| 16 | 1991 | Hepatocyte hepatitis B surface antigen expression in chronic hepatitis B virus carriers in Singapore: Correlation with viral replication and liver pathology | Wee, A.; Yap, I. ; Guan, R. |
| 17 | 1991 | Hepatocyte hepatitis B surface antigen expression in chronic hepatitis B virus carriers in Singapore: Correlation with viral replication and liver pathology | Wee, A. ; Yap, I. ; Guan, R. |
| 18 | Sep-1991 | Horizontal or vertical transmission of hepatitis B virus? A serological survey in family members of hepatitis B carriers in Singapore | Tan, C.C. ; Guan, R. ; Yap, I. ; Tay, H.H. ; Kang, J.Y. |
| 19 | 1991 | Horizontal or vertical transmission of hepatitis B virus? A serological survey in family members of hepatitis B carriers in Singapore | Tan, C.C. ; Guan, R. ; Yap, I. ; Tay, H.H. ; Kang, J.Y. |
| 20 | Jun-1995 | Immunogenicity and safety of an inactivated hepatitis A vaccine amongst Singaporeans. | Guan, R. ; Ng, H.S.; Fock, K.M.; Ho, K.Y.; Yap, I. ; Kang, J.Y. ; Chow, W.C.; Chew, C.N.; Ng, C.; Teo, C.J. |
