Thromboembolism and bleeding tendency in congenital FXII deficiency. A study on 74 subjects from 14 Swiss families - Làmmle, B; Wuillemin, WA; Huber, I; Krauskopf, M; Zuercher, C; Pflugshaupt, R; Furlan, M (Thromb Haemostas, 1991)