1. Phoenix Children's Hospital, Phoenix, Arizona
2. Riley Hospital for Children, Indiana University School of Medicine, Indianapolis
3. Department of Pediatrics, St Louis University, Cardinal Glennon Children's Hospital, St Louis, Missouri
4. Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
5. University of Minnesota Masonic Children's Hospital, Minneapolis
6. Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison
7. Division of Pediatric Endocrinology, Department of Pediatrics, Maimonides Medical Center, Brooklyn, New York