Affiliation: | 1. Sub-department of Medical Genetics, Sheffield S10 2RX, U.K. Department of Pathology, University of Sheffield, Sheffield S10 2RX, U.K.;2. Department of Pathology, University of Sheffield, Sheffield S10 2RX, U.K.;3. Centre for Human Genetics, 117 Manchester Road, Sheffield S10 5DN, U.K. |