“…This suggested greater susceptibility of phenotype A individuals to myocardial infarction, atherosclerotic peripheral vascular occlusive disease, and other forms of CVD than non-A individuals [Kingsbury, 197 1;Weiss, 1972;Allan, 1973;Morris and Bouhoutsos, 1973;Garrison et al, 1976;Cronenwett et al, 1983;Platt et al, 1985;Hrby et al, 19891. Numerous reports of association between ABO phenotypes and total serum cholesterol (TC), one of the recognized major risk factors of CVD, have also appeared [Hames and Greenberg, 1961;Srivastava and Sinha, 1966;Banerjee and Saha, 1969;Oliver et al, 1969;Langman et al, 1969;Medalie et al, 1970;Hagerup et al, 1972;Wakely et al, 1973;Sing and Orr, 1976;Fox et al, 1981;Borecki et al, 1985;George et al, 19871. Higher mean level of TC observed in phenotype A has generated considerable interest on the role of the ABO locus as a factor influencing CVD susceptibility, either directly or indirectly through its effects on the CVD risk factor.…”