Geographic distribution of the 20 210 G to A prothrombin variant - Rosendaal,F.R.; Doggen,C.J.; Zivelin,A.; Arruda,V.R.; Aiach,M.; Siscovick,D.S.; Hillarp,A.; Watzke,H.H.; Bernardi,F.; Cumming,A.M.; Preston,F.E.; Reitsma,P.H. (Thromb Haemost, 1998)