title: No hepatitis after treatment with a modified factor IX concentrate in previously untreated hemophiliacs.
mesh_terms: D001779:Blood Coagulation Factors / Q000009:adverse effects / Q000302:isolation & purification*; D002648:Child; D002675:Child, Preschool; D002845:Chromatography / Q000379:methods; D004340:Drug Contamination / Q000517:prevention & control*; D006467:Hemophilia A / Q000628:therapy*; D006525:Hepatitis, Viral, Human / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D008297:Male; D011446:Prospective Studies
chemical_list: D001779:Blood Coagulation Factors; C025667:prothrombin complex concentrates