About the Authors

Cherry Y. Leung

Current address: Department of Community Medicine and School of Public Health, The University of Hong Kong, Hong Kong.

Affiliation School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People’s Republic of China

Gabriel M. Leung

Current address: Department of Community Medicine and School of Public Health, The University of Hong Kong, Hong Kong.

Affiliation School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People’s Republic of China

C. Mary Schooling

cms1@hkucc.hku.hk

Current address: Department of Community Medicine and School of Public Health, The University of Hong Kong, Hong Kong.

Affiliations School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People’s Republic of China, CUNY School of Public Health and Hunter College, New York, United States of America

Competing Interests

C.M. Schooling is a PLOS ONE Editorial Board; however, this does not alter the authors' adherence to PLOS ONE Editorial policies and criteria.

Author Contributions

Conceived and designed the experiments: CMS. Performed the experiments: CYL. Analyzed the data: CYL. Wrote the paper: CYL CMS. Resurrected the birth cohort: GML CMS.