[Seroepidemiologic study of hepatitis B virus infection in merchant marine college students].
D000293:Adolescent; D002353:Carrier State / Q000276:immunology*; D006509:Hepatitis B / Q000453:epidemiology / Q000276:immunology*; D006510:Hepatitis B Antibodies / Q000032:analysis; D006511:Hepatitis B Antigens / Q000032:analysis; D006801:Humans; D007564:Japan; D008297:Male
D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens