Duke University - Center for the Study of Aging and Human Development, Duke University - Center for the Study of Aging and Human Development, Beijing Genomics Institute (BGI), Beijing Genomics Institute (BGI), Peking University - Center for Healthy Aging and Development Studies, Zhejiang University - Institute of Translational Medicine, Chinese Center for Disease Control and Prevention (China CDC), Government of the United States of America - National Institute of Environmental Health Sciences (NIEHS), Nanjing University - School of Business, Peking University - Center for Healthy Aging and Development Studies, Peking University - Center for Healthy Aging and Development Studies, Peking University - Department of Sociology, Peking University - Department of Sociology, Duke University, Duke University, Duke University, Government of the People's Republic of China - National Center of Gerontology, Government of the People's Republic of China - National Center of Gerontology, Peking University - School of Life Science, Peking University - School of Life Science, Duke University - School of Medicine, University of Southern Denmark, University of Southern Denmark, University College London - Institute for Global Health, Government of the United States of America - National Institute of Environmental Health Sciences (NIEHS), Duke University - Medical Center, Nanchang University - School of Life Science, Beijing Genomics Institute (BGI)Chinese Academy of Sciences (CAS) - College of Life Sciences, Zhejiang University - Institute of Translational Medicine, Beijing Genomics Institute (BGI) and Max Planck Society for the Advancement of the Sciences - Max Planck Institute for Demographic Research