@article{article408266ac, title = {Opitz syndrome is genetically heterogeneous, with one locus on Xp22, and a second locus on 22q11.2}, author = {Robin, N H and Feldman, G J and Aronson, A L and Mitchell, H F and Weksberg, R and Leonard, C O and Burton, B K and Josephson, K D and Laxova, R and Aleck, K A and Allanson, J E}, year = {1995}, doi = {10.1038/ng1295-459}, journal = {Nature Genetics} }