Homozygous G20210A transition in the prothrombin gene associated with severe venous thrombotic disease Two cases in a French family - Zawadzki, C; Gaveriaux, V; Trillot, N; Bauters, A; Watel, A; Alhenc-Gelas, M; Preudhomme, C; Jude, B (Thromb Haemost, 1998)