1. Department of Clinical Nutrition, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan 572000, P.R. China
2. Department of Healthcare, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan 572000, P.R. China
3. Department of Central Laboratory, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan 572000, P.R. China
4. Department of Geriatric Neurology, The Second Medical Center, Chinese PLA General Hospital/National Clinical Research Center for Geriatric Diseases, Beijing 100853, P.R. China