1 Department of Respiratory and Critical Care Medicine, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, No.15 Rd.Yuquan, Beijing 100049, PR China.
2 Department of Neurology, The Affiliated Hospital of Chifeng University, No.42 Street.Wangfu, Chifeng 024005, PR China.
3 Department of Nursing, School of Clinical Medicine, Chifeng University, No.1 Rd.Yingbin, Chifeng 024005, PR China.
4 Department of Neurology, Aerospace Center Hospital, Peking University Aerospace School of Clinical Medicine, No.15 Rd.Yuquan, Beijing 100049, PR China.