1. Department of Geriatrics, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou , China
2. Department of General Practice, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University , Nanchang , China
3. Department of Medical Records, The First Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou , China
4. Key Laboratory of Frailty Research in Older People, Zhejiang Provincial Administration of Traditional Chinese Medicine , Hangzhou , China