Effects of the factor V G1691A mutation and the factor II G20210A variant on the clinical expression of severe hemophilia A in children – results of a multicenter study oleh Karin Kurnik, Wolfhart Kreuz, Sylvia Horneff, Christine Düring, Rosemarie Schobess, Christoph Bidlingmaier, Carmen Escuriola Ettingshausen, Anne Krümpel, Nadia Bogdanova, Ulrike Nowak-Göttl