1. Jinling Hospital Department of Respiratory Medicine, Southern Medical University (Guangzhou), Nanjing, China
2. Fujian Provincial Hospital, Fujian Medical University, Fuzhou, China
3. Department of Respiratory Medicine, No. 92 Hospital of PLA, Nanping, China
4. Department of Geriatric Medicine, Fujian Union Medical College Hospital, Fuzhou, China
5. 1st Affiliated Hospital, Fujian Medical University, Fuzhou, China