Effect of the factor V Leiden mutation on the clinical expression of severe hemophilia A - Lee, DH; Walker, IR; Teitel, J; Poon, MC; Ritchie, B; Akabutu, J; Sinclair, GD; Pai, M; Wu, JWY; Reddy, S; Carter, C; Growe, G; Lillicrap, D; Lam, M; Blajchman, MA (Thromb Haemost, 2000)