An intronic region within the human factor VIII gene is duplicated within Xq29 and is homologous to the polymorphic locus DXS115 (767) - Paterson, MN; Gitschier, J; Bloomfield, J; Bell, M; Dorkins, H; Froster-Iskenius, U; Sommer, S; Sobell, J; Schaid, D; Thibodeau, S; Davies, KE (Am J Hum Genet, 1989)