Coinheritance of the 20210ª allele of the prothrombin gene increases the risk of thrombosis in subjects with familial thrombophilia - Makris, M; Preston, FE; Beauchamp, NJ; Cooper, PC; Daly, ME; Hampton, KK; Bayliss, P; Peake, IR; Miller, GJ (Thromb Haemost, 1997)