1 The Department of Otolaryngology-Head and Neck Surgery, Philadelphia College of Osteopathic Medicine; and the Department of Pediatric Otolaryngology-Head and Neck Surgery, St. Christopher's Hospital for Children, Philadelphia, Pennsylvania, U.S.A.
2 The Department of Pediatric Otolaryngology-Head and Neck Surgery, St. Christopher's Hospital for Children, Philadelphia, Pennsylvania, U.S.A.
3 The New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, U.S.A.