1. Departments of Pediatrics
2. Medicine
3. Department of Medicine, State University of New York, Buffalo, New York
4. Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina
5. Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina
6. Department of Pediatrics, Rainbow Babies and Children's Hospital, Case Western Reserve University, Cleveland, Ohio
7. Departimento Medico Chirurgico di Cardiologia Pediatria, Ospedale Pediatrico Bambino Gesù, Rome, Italy