1. McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; Baltimore Maryland
2. Predoctoral Training Program in Human Genetics; McKusick-Nathans Institute of Genetic Medicine; Baltimore Maryland
3. National Institutes of Health: National Institute of Neurological Disorders and Stroke; Bethesda Maryland
4. Department of Pathology; Johns Hopkins University School of Medicine; Baltimore Maryland
5. Dermatology Department; Yale School of Medicine; New Haven Connecticut