1. Environmental Research Center, Duke Kunshan University, Kunshan, China.
2. School of Medicine, Yale University, New Haven, Connecticut, USA.
3. Center for the Study of Aging and Human Development, Duke Medical School, Durham, North Carolina, USA.
4. Center for Healthy Aging and Development Studies, National School of Development, Peking University, Beijing, China.
5. Nicholas School of the Environment, Duke University, Durham, North Carolina, USA.