title: Letter: HB Ag and HB Ab in Thai blood donors.
mesh_terms: D000017:ABO Blood-Group System; D000410:Alanine Transaminase / Q000097:blood; D001219:Aspartate Aminotransferases / Q000097:blood; D001782:Blood Donors; D005500:Follow-Up Studies; D006506:Hepatitis A / Q000276:immunology*; D006511:Hepatitis B Antigens; D006649:Histocompatibility Antigens; D006801:Humans
chemical_list: D000017:ABO Blood-Group System; D006511:Hepatitis B Antigens; D006649:Histocompatibility Antigens; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase