1. From the Department of Otolaryngology, Chang Gung
Memorial Hospital–Kaohsiung Medical Center, Chang Gung University College of
Medicine, Kaohsiung, Taiwan
2. Graduate Institute of Occupational Safety and Health,
Kaohsiung Medical University, and the Department of Occupational and Environmental
Medicine, Kaohsiung Medical University–Chung-Ho Memorial Hospital,
Kaohsiung
3. Department of Otolaryngology, E-Da Hospital, I-Shou
University, Kaohsiung