on behalf of the ISCOAT (Italian Study on Complications of Oral Anticoagulant Therapy) Study Group - Palareti, G; Leali, N; Coccheri, S; Poggi, M; Manotti, C; D’Angelo, A; Pengo, V; Erba, N; Moia, M; Ciavarella, N; Devoto, G; Berrettini, M; Musolesi, S (Bleeding complications of oral anticoagulant treatment: an inception-cohort, prospective, collaborative study (ISCOAT), 1996)