1. Department of Neurosurgery The First Hospital of China Medical University Shenyang Liaoning People's Republic of China
2. Department of Neurosurgery The First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shanxi People's Republic of China
3. Center of Brain Science The First Affiliated Hospital of Xi'an Jiaotong University Xi'an Shanxi People's Republic of China
4. Department of Otorhinolaryngology Head and Neck Surgery The First Hospital of China Medical University Shenyang Liaoning People's Republic of China