1. Department of Oncology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China
2. Department of Respiratory, Chongqing Three Gorges Central Hospital, Chongqing 404000, China
3. Respiratory Department of the Elderly, Chongqing Public Health Medical Center, Chongqing 400036, China
4. Pulmonary And Critical Care Medicine Ward, Eastern Hospital, Sichuan Provincial Medical Sciences Academy & Sichuan Provincial People’s Hospital, Chengdu 610100, China
5. Department of Respiratory Medicine, the First Affiliated Hospital of Hainan Medical University, Haikou 570102, China