Doses of hepatitis B revaccination needed for the seronegative youths to be seropositive to antibody against hepatitis B surface antigen. - Jan, Chyi-Feng; Liu, Tzu-Hung; Ho, Chien-Han; Chien, Yin-Chu; Chang, Che-Jui; Guo, Fei-Ran; Huang, Kuo-Chin (Family Practice, 2020)