Linkage of hereditary haemorrhagic telangiectasia to chromosome 9q34 and evidence for locus heterogeneity - Heutink, P; Haitjema, T; Breedveld, G J; Janssen, B; Sandkuijl, L A; Bontekoe, C JM; Westerman, C JJ; Oostra, B A (J Med Genet, 1994)