1. Department of Neurology, The Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Qingdao, China
2. Institute of Integrative Medicine, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, China
3. Wayne State University School of Medicine, Detroit, MI, USA
4. Department of Neurology, Institute of Cerebrovascular Diseases, The Affiliated Hospital of Qingdao University, Qingdao 266000, China
5. Department of Neurosurgery, Wayne State University School of Medicine, Detroit, MI, USA