1. School of Information Management, Nanjing University, Nanjing 210023, China
2. Institute of Medical Informatics and Management, Nanjing Medical University, Nanjing 210023, China
3. School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing 210023, China
4. Center for Data Management, The First Affiliated Hospital of Nanjing Medical University (Jiangsu Province Hospital), Nanjing 210023, China
5. Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
6. Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University (Jiangsu Province Hospital), Nanjing 210023, China