1. Department of Otolaryngology-Head and Neck Surgery; University of North Carolina at Chapel Hill; Chapel Hill North Carolina U.S.A
2. Department of Oral Diagnosis; Division of Radiology; Piracicaba Dental School; University of Campinas; Campinas Brazil
3. Department of Pediatrics; Section of Pediatric Pulmonology; Allergy; and Sleep Medicine; Riley Children's Hospital; Indiana University School of Medicine; Indianapolis Indiana U.S.A
4. Department of Physics and Astronomy; University of North Carolina at Chapel Hill; Chapel Hill North Carolina U.S.A
5. University of North Carolina Craniofacial Center; Chapel Hill North Carolina U.S.A