Risk of stroke in young women and two prothrombotic mutations: factor V Leiden and prothrombin gene variant (G20210A) - Longstreth, WT, Jr; Rosendaal, FR; Siscovick, DS; Vos, HL; Schwartz, SM; Psaty, BM; Raghunathan, TE; Koepsell, TD; Reitsma, PH (Stroke, 1998)