Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China. Department of Neurology, 215 Hospital of Shaanxi NI, Xianyang, 712021, China. Department of Neurology, Ankang Central Hospital, Ankang, 725000, China. Department of Neurology, Xianyang Central Hospital, Xianyang, 712000, China. Department of Neurology, Hanzhong Central Hospital, Hanzhong, 723000, China. Department of Neurology, Weinan Central Hospital, Weinan, 714000, China. Department of Neurology, Xi'an 141 Hospital, Xi'an, 710499, China. Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China. Department of Neurology, Xi'an Gaoxin Hospital, Xi'an, 710075, China. Department of Neurology, Xi'an XD Group Hospital, Xi'an, 710077, China. Department of Neurology, Shangluo Central Hospital, Shangluo, 726000, China. Department of Neurology, Yulin No.2 Central Hospital, Yulin, 719000, China. Department of Neurology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China. Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China. Department of Neurology, 521 Hospital of NORINCO Group, Xi'an, 710000, China. Department of Neurology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, 710021, China. Department of Neurology, Tongchuan People's Hospital, Tongchuan, China. The Shaanxi Cerebrovascular Disease Clinical Research Center, Xi'an, 710032, China.