Plasma fibrinogen and fibrinogen genotypes in 4685 cases of myocardial infarction and in 6002 controls: Test of causality by "Mendelian randomisation" - Youngman, L; Keavney, B; Palmer, A; Parish, S; Clark, S; Danesh, J; Delepine, M; Lathrop, M; Peto, R; Collins, R (2000)