1. Greenwood Genetic Center, Columbia, South Carolina.
2. Division of Gastroenterology, Hepatology, and Nutrition, and Director, Endoscopy Services, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, Cincinnati, Ohio.
3. Clinical Genetics, Cincinnati Children's Craniofacial Center, and is Professor-Pediatrics, Division of Human Genetics, Cincinnati Children's Hospital Medical Center and University of Cincinnati College of Medicine, Cincinnati, Ohio.