1. Department of Otolaryngology-Head and Neck Surgery, Taipei Veterans General Hospital, No. 201, Section 2, Shipai Road, Beitou District, Taipei City 11217, Taiwan
2. Institute of Brain Science, National Yang-Ming University, No. 155, Section 2, Linong Street, Taipei City 11221, Taiwan
3. Department of Otolaryngology, National Yang-Ming University School of Medicine, No. 155, Section 2, Linong Street, Taipei City 11221, Taiwan
4. Department of Otolaryngology, Taoyuan Armed Forces General Hospital, No. 168, Zhongxing Road, Longtan District, Taoyuan City 32551, Taiwan
5. Department of Otolaryngology-Head and Neck Surgery, Tri-Service General Hospital, National Defense Medical Center, No. 325, Section 2, Chenggong Road, Neihu District, Taipei City 114, Taiwan
6. Department of Otolaryngology, Ipswich Hospital NHS Trust, Heath Road, Ipswich, Suffolk IP4 5PD, UK
7. Department of Otolaryngology-Head and Neck Surgery, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo Prefecture 663-8131, Japan
8. Department of Otolaryngology and Head and Neck Surgery, Klinikum Bielefeld, Teutoburger Straße 50, 33604 Bielefeld, Germany
9. Department of Pediatrics, Mackay Memorial Hospital, No. 92, Section 2, Zhongshan N. Road, Taipei City 10449, Taiwan