Genotypic and phenotypic resistance: longitudinal and sequential analysis of hepatitis B virus polymerase mutations in patients after liver transplantation with lamivudine resistance: Ziv Ben-Ari, Liver Inst, Rabin Medical Ctr, Beilinson Campus, Petah-Tikva Israel; Nili Daudi, Athalia Klein, Liver Unit, Hadassah Univ Hosp, Jerusalem Israel; Jaqueline Sulkes, Epidemiology Unit, Rabin Medical Ctr, Beilinson Campus, Petah-Tikva Israel; Zmira Samra, Dept of Microbacteriology, Rabin Medical Ctr, Beilinson Campus, Petah-Tikva Israel; Daniel Shouval, Liver Unit, Hadassah Univ Hosp, Jerusalem Israel; Ran Tur-Kaspa, Liver Inst, Rabin Medical Ctr, Beilinson Campus, Petah-Tikva Israel