Frequent presence of HBV in the sera of HBsAg‐negative, anti‐HBc‐positive blood donorsHiroshi Yotsuyanagi, Kazuhiko Koike, Hajime Fujie et al.|Transfusion|2001Cited by 94
Distinct geographic distributions of hepatitis B virus genotypes in patients with acute infection in JapanHiroshi Yotsuyanagi, Shiro Iino, Etsuro Orito et al.|Journal of Medical Virology|2005Cited by 60