The Malmö polymorphism of coagulation factor IX, an immunologic polymorphism due to dimorphism of residue 148 that is in linkage disequilibrium with two other F. IX polymorphisms - Graham, J B; Lubahn, D B; Lord, S T; Kirshtein, J; Nilsson, I M; Wallmark, A; Ljung, R; Frazier, L D; Ware, J L; Lin, S-W; Stafford, D W; Bosco, J (Am J Hum Genet, 1988)