Laar, M.J.W. van de

netherland genotype transmission hepatitis patient hbsag drug use infection contact clinic hepatitis b virus anti-hbc 1-0 heterosexual risk factors women std clinic partner vaccination half year drug users prevalence country virus group strain number health hepatitis b rotterdam hbv infection study university hospital rotterdam cluster sequence population disease factor virol table month hbv markers subcluster dutch risk groups university model amsterdam visitor hbsag positivity history heterosexual contact individual marker analysis ampli fied coutinho ra 3 months hospital epidemiology hbv infections association hbv genotype hepatitis b vaccination ethnicity phylogenetic std clinic attendants std clinic population blood –blood contacts std clinics primers orogenital contact heterosexual transmission houdt risk behaviour norder hbv prevalence positivity 2004. screening