title: Hepatitis B antigen (HBAg) in the tropics: review of epidemiology and recommendations for control.
mesh_terms: D006509:Hepatitis B / Q000453:epidemiology* / Q000517:prevention & control; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D009549:Nigeria; D014329:Tropical Climate
chemical_list: D006511:Hepatitis B Antigens