1. Department of Health Management, Second Affiliated Hospital, Fourth Military Medical University, Xi’an, China
2. Department of Neurology, Second Affiliated Hospital, Fourth Military Medical University, Xi’an, China
3. Health Management Institute, Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese People's Liberation Army General Hospital, Beijing, China
4. Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi'an, China