Institution: | Department of Orthopedics, Second Hospital, Lanzhou University, Lanzhou 730000, Gansu Province, China; Department of Pneumology, Lanzhou General Hospital, Lanzhou Military Area Command of Chinese PLA, Lanzhou 730050, Gansu Province, China; Department of Neurology, Second Hospital, Lanzhou University, Lanzhou 730000, Gansu Province, China; Department of Orthopedics, Lanzhou General Hospital, Lanzhou Military Area Command of Chinese PLA, Lanzhou 730050, Gansu Province, China) |