title: Incidence of hepatitis-associated antigen in a Toronto hospital.
mesh_terms: D001771:Blood Banks; D001803:Blood Transfusion; D002170:Canada; D006509:Hepatitis B / Q000453:epidemiology* / Q000382:microbiology; D006511:Hepatitis B Antigens / Q000302:isolation & purification; D006515:Hepatitis B virus / Q000302:isolation & purification*; D006801:Humans; D005779:Immunodiffusion
chemical_list: D006511:Hepatitis B Antigens