A Gla domain mutation (Arg 15 to Trp) in the protein C (PROC) gene causing type 2 protein C deficiency and recurrent venous thrombosis - Millar, D S; Grundy, C B; Bignell, P; Moffat, E H; Martin, R; Kakkar, V V; Cooper, D N (Blood Coag Fibrinol, 1993)