2Mast EE, Alter MJ. Epidemiology of viral hepatitis: an overview.Semin Virol, 1993,4:273-283.
3Lai CL, Chien RN, Leung NWY, et al. A one-year trial of lamivudine for chronic hepatitis B. NEJM, 1998,339:61-68.
4Kobayashi Satsuki, Ide Tatsuya, Sata Miehio, et al. Detection of YMDD motif mutations in some lamivudine~untreated asymptomatic hepatitis B virus carriers. J Hepatol, 2001,34 : 584-586.
5Kirishima Toshihiko, Okanoue Takeshi, Daimon Yukiko, et al.Detection of YMDD mutant using a novel sensitive method in chronic liver disease type B patients before and during lamivudine treatment. J Hepatol, 2002, 37: 259-265.