1. Department of Otolaryngology University of Pittsburgh School of Medicine Pittsburgh Pennsylvania U.S.A.
2. Division of Pediatric Otolaryngology UPMC Children's Hospital of Pittsburgh Pittsburgh Pennsylvania U.S.A.
3. Division of Pediatric Endocrinology, Department of Pediatrics University of Pittsburgh School of Medicine Pittsburgh Pennsylvania U.S.A.
4. Department of Surgery University of Pittsburgh School of Medicine Pittsburgh Pennsylvania U.S.A.
5. Department of Pathology UPMC Shadyside Hospital & Children's Hospital of Pittsburgh Pittsburgh Pennsylvania U.S.A.