1. Division of Human Genetics; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
2. Genetic Counseling Program, College of Medicine; University of Cincinnati; Cincinnati Ohio
3. Division of Human Genetics, Department of Pediatrics; Children's Hospital Medical Center; Cincinnati Ohio
4. Cincinnati Children's Hospital Medical Center; Heart Institute; Cincinnati Ohio
5. Pediatric Cardiology; Children's Hospital of Wisconsin; Milwaukee Wisconsin
6. Department of Pediatrics, College of Medicine; University of Cincinnati; Cincinnati Ohio