Protein S deficiency: A database of mutations - Gandrille, S; Borgel, D; Ireland, H; Lane, DA; Simmonds, R; Reitsma, PH; Mannhalter, C; Pabinger, I; Saito, H; Suzuki, K; Formstone, C; Cooper, DN; Espinosa, Y; Sala, N; Bernardi, F; Aiach, M (Thromb Haemost, 1997)