Homozygous and heterozygous deletions of the von Willebrand factor gene in patients and carriers of severe von Willebrand’s disease - Ngo, K; Glotz, V T; Koziol, J A; Lynch, D C; Gitschier , J; Ranieri, R P; Ciavarel-la, N; Ruggeri, A M; Zimmerman, T S (Proc Nat Acad Sci USA, 1988)