[Xu, Huilan; Tang, Kun] Cent South Univ, Xiangya Sch Publ Hlth, Dept Social Med & Hlth Management, Changsha 410008, Peoples R China.
[Tang, Kun] Cent South Univ, Xiangya Hosp, Dept Discipline Construct, Changsha 410008, Peoples R China.
[Zhang, Jingwei; Wang, Zeyu; Zhang, Hao; Zhang, Xun; Cheng, Quan; Xiao, Gelei] Cent South Univ, Xiangya Hosp, Dept Neurosurg, Changsha 410008, Peoples R China.
[Zhang, Jingwei; Wang, Zeyu; Zhang, Hao; Zhang, Xun; Cheng, Quan; Xiao, Gelei] Natl Clin Res Ctr Geriatr Disorders, Changsha 410008, Peoples R China.
[Cao, Hui] Second Peoples Hosp Hunan Prov, Brain Hosp Hunan Prov, Changsha 410007, Peoples R China.