title: [Prospective study of chronic asymptomatic carriers of hepatitis B surface antigen].
mesh_terms: D000293:Adolescent; D000328:Adult; D001782:Blood Donors; D002353:Carrier State / Q000276:immunology*; D002677:Chile; D005260:Female; D005500:Follow-Up Studies; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D008099:Liver / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
chemical_list: D006514:Hepatitis B Surface Antigens
vernacular_title: Estudio prospectivo de portadores crónicos asintomáticos del antígeno de superficie de la hepatitis B.