title: Levamisole and HBsAg positive chronic persistent hepatitis.
mesh_terms: D002648:Child; D002675:Child, Preschool; D006509:Hepatitis B / Q000188:drug therapy* / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006801:Humans; D007978:Levamisole / Q000627:therapeutic use*
chemical_list: D006514:Hepatitis B Surface Antigens; D007978:Levamisole