Prevalence of hepatitis B virus, hepatitis C virus, human immunodeficiency virus and Treponema pallidum infections in hospitalized patients before transfusion in Xiangya hospital C... oleh Wei-Wei Cao, Rong-Rong Zhou, Xinghua Ou, Ling-Xi Shi, Chao-Qi Xiao, Ting-Yin Chen, Hua Tan, Xue-Gong Fan, Bi-Juan Li, Ning Li