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| | Issue Date | Title | Author(s) |
| 41 | 1985 | Ranitidine in the acute treatment of duodenal ulcer. A double-blind placebo-controlled trial | Yap, I. ; LaBrooy, S.J.; Tay, H.H. ; Guan, R. ; Kang, J.Y. |
| 42 | 1992 | Recombinant DNA hepatitis B vaccine containing pre-S components of the HBV coat protein - A preliminary study on immunogenicity | Yap, I. ; Guan, R. ; Chan, S.H. |
| 43 | 1992 | Recombinant DNA hepatitis B vaccine containing pre-S components of the HBV coat protein - A preliminary study on immunogenicity | Yap, I.; Guan, R. ; Chan, S.H. |
| 44 | Apr-1996 | Serological profiles of hepatitis B carrier patients in Singapore with special reference to the frequency and significance of concurrent presence of HBsAg and anti-HBs | Wang, Y.M. ; Ng, W.C. ; Kang, J.Y. ; Yap, I. ; Seet, B.L.; Teo, J. ; Smith, R.; Guan, R. |
| 45 | 1996 | Serological profiles of hepatitis B carrier patients in Singapore with special reference to the frequency and significance of concurrent presence of HBsAg and anti-HBs | Wang, Y.M. ; Ng, W.C. ; Kang, J.Y. ; Yap, I. ; Seet, B.L.; Teo, J.; Smith, R.; Guan, R. |
| 46 | Dec-1991 | Seroprevalence of antibodies to the hepatitis C virus in Singapore. | Yap, I. ; Guan, R. ; Kang, J.Y. ; Tay, H.H. ; Lee, E. ; Choong, L.; Woo, K.T. |
| 47 | 1991 | Seroprevalence of antibodies to the hepatitis C virus in Singapore. | Yap, I. ; Guan, R. ; Kang, J.Y. ; Tay, H.H.; Lee, E. ; Choong, L.; Woo, K.T. |
| 48 | Oct-1996 | Seroprevalence of hepatitis B and C viral markers in patients with primary hepatocellular carcinoma in Singapore | Khin, L.W.; Teo, C.J. ; Guan, R. |
| 49 | 1995 | Study on the comparative immunogenicity of a recombinant DNA hepatitis B vaccine containing pre-S components of the HBV coat protein with non pre-S containing vaccines | Yap, I. ; Guan, R. ; Chan, S.H. |
| 50 | 1995 | Study on the comparative immunogenicity of a recombinant DNA hepatitis B vaccine containing pre-S components of the HBV coat protein with non pre-S containing vaccines | Yap, I. ; Guan, R. ; Chan, S.H. |
| 51 | 1996 | Subcutaneously administered recombinant human β-interferon in the treatment of chronic hepatitis B virus infection | Guan, R. ; Yeoh, K.G. ; Yap, I. ; Kang, J.Y. ; Wee, A. ; Smith, R. |
| 52 | 1996 | Subcutaneously administered recombinant human β-interferon in the treatment of chronic hepatitis B virus infection | Guan, R. ; Yeoh, K.G. ; Yap, I. ; Kang, J.Y. ; Smith, R.; Wee, A. |
| 53 | 1995 | The effect of polyunsaturated phosphatidyl choline in the treatment of acute viral hepatitis | Guan, R. ; Ho, K.Y. ; Kang, J.Y. ; Yap, I.; Gwee, K.A. ; Tan, C.C. |
| 54 | Sep-1990 | The immune response of low dose recombinant DNA hepatitis B vaccine in teenagers in Singapore | Guan, R. ; Tay, H.H. ; Yap, I. ; Smith, R.; Tan, L.H. |
| 55 | 1990 | The immune response of low dose recombinant DNA hepatitis B vaccine in teenagers in Singapore | Guan, R. ; Tay, H.H. ; Smith, R.; Tan, L.H.; Yap, I. |
| 56 | 1990 | The influence of dialect group on peptic ulcer frequency amongst the Chinese in Singapore | Kang, J.Y. ; Yap, I. ; Labrooy, S.J.; Guan, R. ; Tay, H.H. ; Lim, K.P.; Math, M.V. |
| 57 | 1990 | The influence of dialect group on peptic ulcer frequency amongst the Chinese in Singapore | Kang, J.Y. ; Yap, I. ; Labrooy, S.J.; Guan, R. ; Tay, H.H. ; Lim, K.P.; Math, M.V. |
| 58 | 1990 | The site of recurrent duodenal ulcer | Kang, J.Y. ; Guan, R. ; Tay, H.H. ; Yap, I. ; Math, M.V. ; Labrooy, S.J. |
| 59 | 1990 | The site of recurrent duodenal ulcer | Kang, J.Y. ; Guan, R. ; Tay, H.H. ; Yap, I. ; Math, M.V. ; Labrooy, S.J. |
| 60 | Oct-1993 | Transjugular intrahepatic portosystemic shunt: a case report. | Goh, P.S. ; Tan, L. ; Guan, R. |
