1. School of Biomedical Engineering, Capital Medical University, Beijing, China
2. Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, Capital Medical University, Beijing, China
3. Department of Global Health Management and Policy, Tulane University, New Orleans, LA
4. Centre for Health Statistics and Information, The National Health and Family Planning Commission of China, Beijing, China
5. School of Biomedical Informatics, The University of Texas Health Science Centre at Houston, TX
6. Department of Information Management, Department of General Internal Medicine, Peking Union Medical College Hospital Peking Union Medical College Chinese Academy of Medical Sciences, Beijing, China