1. Department of Pulmonary Medicine; Zhongshan Hospital, Fudan University; Shanghai 200032, China
2. Clinical Center for Sleep Breathing Disorder and Snoring, Zhongshan Hospital, Fudan University; Shanghai 200032, China
3. Department of Respiratory Medicine; Ningbo Medical Center Lihuili Eastern Hospital, Taipei Medical University Ningbo Medical Center; Ningbo 315040, China