Linkage disequilibrium at the cystathionine B synthase (CBS) locus and the association between genetic variation at the CBS locus and plasma levels of homocysteine - De Stefano, V; Dekou, V; Nicaud, V; Chasse, JF; London, J; Stansbie, D; Humphries, SE; Gudnason, V (Ann Hum Genet, 1998)