“…However, with the exception of the nodular sclerotic type of HD, increased risk is consistently associated with A1 and A8. The " 4 C " group of antigens (B5, Bw35, Bw15, B18) is less clearly associated with HD (Falk and Osoba, 1971 ;Graff et al, 1974;McDevitt and Bodmer, 1974;Kissmeyer-Nielsen et al, 1975). In inbred mice, genes regulating susceptibility to virus leukemogenesis and immune response are closely linked to histocompatibility genes (Lilly and Pincus, 1973;Benacerraf and Dorf, 1974); thus the HLA association with HD may reflect enhanced susceptibility to an oncogenic virus (Forbes and Morris, 1972).…”