1. Center for Pediatric ENT–Head and Neck Surgery, Boynton Beach, Florida
2. Otolaryngology Department, Hospital Vall d’Hebron, Barcelona, Spain
3. private practice, Johannesburg, South Africa
4. Central California Clinical Research, Fresno
5. Vital Prospects Clinical Research Institute PC, Tulsa, Oklahoma
6. Carolina ENT Clinic (Centri Inc), Orangeburg, South Carolina
7. Spartanburg Ear Nose & Throat, North Grove Medical Park, Spartanburg, South Carolina
8. Ear, Nose, and Throat, Constantiaberg Medi-Clinic, Cape Town, South Africa
9. Greensboro Ear, Nose & Throat, Greensboro, North Carolina
10. private practice, Conroe, Texas
11. Ear, Nose, and Throat Department, NEA Baptist Clinic, Jonesboro, Arkansas
12. Otolaryngology Department, Hospital Quirón, Madrid, Spain