title: Screening tests for HBsAg in transfusion centres of developing countries.
mesh_terms: D001782:Blood Donors; D001803:Blood Transfusion; D003906:Developing Countries; D006509:Hepatitis B / Q000517:prevention & control; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007159:Immunologic Tests
chemical_list: D006514:Hepatitis B Surface Antigens