Hereditary protein S deficiency and venous thrombo-embolism - Broekmans, A W; Bertina, R M; Reinalda-Poot, J; Engesser, L; Muller, H P; Leeuw, J A; Michiels, J J; Brommer, E JP; Briet, E (A study in three Dutch families. Thromb. Haemostas., 1985)