1. Department of Neurosurgery, Qingdao Municipal Hospital (Headquarters), Qingdao, Shandong Province;
2. Department of Neurosurgery, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, Shandong Province; and
3. Division of Life Sciences and Medicine, Department of Neurosurgery, The First Affiliated Hospital of the University of Science and Technology of China, Hefei, Anhui Province, People’s Republic of China