Fig. 1
From: Occult hepatitis B virus infection: influence of S protein variants
Distribution of OBI and control patients in 15 families included in this study. Symbols: square, male; circle, female; O, OBI patient; C, control patient; CHI, chronic HBV infection patient; ND, not detected. Each family was assigned an ID number. If a family had two OBI or control patients, a, b were used to specify them respectively