title: An epidemiologic study on hepatitis B virus infection in Chiang Mai, 1983-1984.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002681:China; D006509:Hepatitis B / Q000453:epidemiology*; D006510:Hepatitis B Antibodies / Q000032:analysis; D006511:Hepatitis B Antigens / Q000032:analysis; D006801:Humans; D008875:Middle Aged
chemical_list: D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens