1. Department of Otolaryngology, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
2. Sleep Center of Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
3. School of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
4. Division of Pulmonary and Critical Care Medicine, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
5. Department of Nursing, Chang Gung University of Science and Technology, Chiayi 61363, Taiwan
6. Department of Respiratory Care, Chang Gung University of Science and Technology, Chiayi 61363, Taiwan
7. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
8. Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan