1. Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, Hefei, Anhui, China
2. Department of Environmental Health, School of Public Health, Shanxi Medical University, TaiYuan, Shanxi, China
3. Department of Respiratory and Critical Care Medicine, The Geriatric Institute of Anhui, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
4. Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
5. Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Anhui Province Key Laboratory of Major Autoimmune Diseases, Hefei, Anhui, China
6. School of Nursing, Anhui Medical University, Hefei, Anhui, China