1. Division of Pediatric Otolaryngology–Head and Neck SurgeryCincinnati Children's Hospital Medical Center Cincinnati Ohio
2. Department of Otolaryngology–Head and Neck SurgeryUniversity of Cincinnati College of Medicine Cincinnati Ohio
3. Department of Otolaryngology–Head and Neck SurgeryMayo Clinic Scottsdale Arizona U.S.A
4. Division of Biostatistics and EpidemiologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
5. Department of Radiology and Medical ImagingCincinnati Children's Hospital Medical Center Cincinnati Ohio