1. Department of Neurology, Gansu Provincial Hospital, Lanzhou City, Gansu Province, PR China
2. School of Clinical Medicine, Gansu University of Traditional Chinese Medicine, Lanzhou City, Gansu Province, PR China
3. Institute of Anatomy and Histology and Embryology, Neuroscience, School of Basic Medical Sciences, Lanzhou University, Lanzhou City, Gansu Province, PR China