1. Department of Anatomy, Histology and Embryology and K.K. Leung Brain Research Centre, The Fourth Military Medical University, Xi’an 710032, China
2. Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
3. Department of Burns and Cutaneous Surgery, Xijing Hospital, The Fourth Military Medical University, Xi’an 710032, China