title: Letter: Clinical significance of HBsAg subtypes D and Y in acute viral hepatitis B.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006509:Hepatitis B / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay; D012703:Serotyping
chemical_list: D006511:Hepatitis B Antigens