1. Department of Otolaryngology, Washington University School of Medicine, Pittsburgh, Pennsylvania, USA
2. Department of Dermatology, New York Medical College, Metropolitan Hospital Center, Valhalla, New York, USA
3. Division of Pediatric Otolaryngology, Children’s Hospital of Pittsburgh of UPMC, Pittsburgh, Pennsylvania, USA
4. Department of Otolaryngology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA