title: Epidemiology of delta infection in Spain.
mesh_terms: D002353:Carrier State; D006509:Hepatitis B / Q000150:complications*; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D003699:Hepatitis D / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D008297:Male; D013030:Spain
chemical_list: D006514:Hepatitis B Surface Antigens