1. Department of Otolaryngology, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan
2. Department of Nursing, Chang Gung Institute of Technology, Taoyuan, Taiwan
3. Department of Sleep Medicine, Royal Infirmary Edinburgh, United Kingdom
4. Department of Otolaryngology, Cathay General Hospital, Taipei, Taiwan
5. School of Medicine, Fu Jen Catholic University, Taipei, Taiwan
6. School of Public Health, China Medical University, Taichung, Taiwan
7. Department of Pulmonary and Critical Care Medicine, Sleep Center, Chang Gung Memorial, Taichung, Taiwan