1. Clinical Medical College, Weifang Medical University, Weifang, 261042, Shandong, P.R, China; Department of Pulmonary and Critical Care Medicine, Yantai Yuhuangding Hospital, Yantai, 264099, Shandong, P.R, China
2. Department of Pulmonary and Critical Care Medicine, Yantai Hospital of traditional Chinese Medicine, Yantai, 264013, Shandong, P.R, China
3. Department of Neurology, Yantai Yuhuangding Hospital, Yantai, 264099, Shandong, P.R, China
4. Department of Pulmonary and Critical Care Medicine, Yantai Yuhuangding Hospital, Yantai, 264099, Shandong, P.R, China