1. Department of Human Anatomy, Histology and Embryology, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an 710061, China
2. Department of Neurology, Xi’an Central Hospital, Xi’an Jiaotong University School of Medicine, Xi’an 710003, China
3. Department of Neurosurgery, Tangdu Hospital, Air Force Military Medical University, Xi’an 710038, China