title: HBsAg in placentas.
authors.forename: H H
authors.initials: HH
authors.lastname: Lin
mesh_terms: D002353:Carrier State / Q000276:immunology; D005260:Female; D006509:Hepatitis B / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D010920:Placenta / Q000276:immunology*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000276:immunology
chemical_list: D006514:Hepatitis B Surface Antigens