1. Division of Pediatric Otolaryngology–Head and Neck Surgery Cincinnati Ohio
2. Department of Otolaryngology–Head and Neck SurgeryUniversity of Cincinnati College of Medicine Cincinnati Ohio
3. Division of Biostatistics and EpidemiologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
4. Department of Otolaryngology Head and Neck SurgeryDwight Eisenhower Army Medical Center Fort Gordon Georgia U.S.A