title: Questions of quality: how much HBsAg is there in this sample and is our assay sensitive enough to detect it?
authors.forename: J A
authors.initials: JA
authors.lastname: Barbara
mesh_terms: D001782:Blood Donors; D006514:Hepatitis B Surface Antigens / Q000097:blood*; D006801:Humans; D011786:Quality Control; D012016:Reference Values; D012680:Sensitivity and Specificity
chemical_list: D006514:Hepatitis B Surface Antigens