title: Persistence of hepatitis associated antigen within a fixed population.
mesh_terms: D000328:Adult; D000368:Aged; D000410:Alanine Transaminase / Q000097:blood; D001219:Aspartate Aminotransferases / Q000097:blood; D001789:Blood Group Antigens; D002353:Carrier State / Q000276:immunology; D005260:Female; D005500:Follow-Up Studies; D006505:Hepatitis / Q000175:diagnosis; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D007564:Japan; D008111:Liver Function Tests; D008297:Male; D008875:Middle Aged; D009689:Nuclear Warfare; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic; D012959:Socioeconomic Factors; D013997:Time Factors
chemical_list: D001789:Blood Group Antigens; D006511:Hepatitis B Antigens; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase