1 Sleep Medical Center of Gansu Provincial Hospital, Lanzhou, 730000, China; Gansu Provincial Sleep Clinical Medical Research Center, Lanzhou, 730000, China.
2 Department of Otolaryngology, Minxian County People's Hospital, Dingxi, 743000, China.
3 Department of Radiology, Gansu Provincial Hospital, Lanzhou, 730000, China.
4 Sleep Medical Center of Gansu Provincial Hospital, Lanzhou, 730000, China; Gansu Provincial Sleep Clinical Medical Research Center, Lanzhou, 730000, China. Electronic address: xyp5894@163.com.