1 Department of Pulmonary Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao266011, China.
2 Department of Anesthesia, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao266011, China. Electronic address: slixin1230@126.com.
3 Department of Pulmonary Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao266011, China. Electronic address: lyc5627@protonmail.com.