1. Department of Otorhinolaryngology—Head and Neck Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
2. School of Medicine, National Defense Medical Center, Taipei, Taiwan
3. School of Medicine, College of Medicine, National Sun Yat-Sen University, Kaohsiung, Taiwan
4. Department of Biomedical Engineering, College of Engineering, National Cheng Kung University, Tainan, Taiwan