First trimester prenatal diagnosis of hemophilia A by the combined use of DNA probes - Sampietro, M; Romano, M; Cappellini, M D; Fiorelli, G; Camerino, G; Travi, M; Ferrari, M; Brambati, B; Guerneri, S; Krachmalnicoff, A; Mannucci, P M (Thromb Haemostas, 1987)