| Affiliation: | 1. Division of Non‐communicable Diseases Control and Community Health, Chinese Center for Disease Control and Prevention, , Beijing, China;2. Department of Medicine, Duke University School of Medicine, , Durham, North Carolina, USA;3. Department of Sociology & Anthropology, University of Rhode Island, , Kingston, Rhode Island, USA;4. Center for the study of Aging and Human Development, School of Medicine, Duke University, , Durham, North Carolina, USA;5. Center for Healthy Aging and Development Studies, National School of Development, Peking University, , Beijing, China |
