About the Authors

Shah Ebrahim

shah.ebrahim@lshtm.ac.uk

Affiliations Department of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom, South Asia Network for Chronic Disease, Public Health Foundation of India, New Delhi, India

Sanjay Kinra

Affiliation Department of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Liza Bowen

Affiliation Department of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Elizabeth Andersen

Affiliation Department of Epidemiology & Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Yoav Ben-Shlomo

Affiliation Department of Social Medicine, University of Bristol, Bristol, United Kingdom

Tanica Lyngdoh

Affiliation South Asia Network for Chronic Disease, Public Health Foundation of India, New Delhi, India

Lakshmy Ramakrishnan

Affiliation Department of Biochemistry, All India Institute of Medical Sciences, New Delhi, India

R. C. Ahuja

Affiliation Department of Medicine, King George's Medical College and Institute of Clinical Epidemiology, Lucknow, India

Prashant Joshi

Affiliation Department of Medicine, Government Medical College, Nagpur, India

S. Mohan Das

Affiliation Department of Neurology, Krishna Institute of Medical Sciences, Hyderabad, India

Murali Mohan

Affiliation Department of Medicine, Dr. B R Ambedkar Medical College, Bangalore, India

George Davey Smith

Affiliation Department of Social Medicine, University of Bristol, Bristol, United Kingdom

Dorairaj Prabhakaran

Affiliations South Asia Network for Chronic Disease, Public Health Foundation of India, New Delhi, India, Centre for Chronic Disease Control, New Delhi, India, Public Health Foundation of India, New Delhi, India

K. Srinath Reddy

Affiliation Public Health Foundation of India, New Delhi, India

for the Indian Migration Study group¶

Membership of the Indian Migration Study group is provided in the Acknowledgments.

Competing Interests

George Davey Smith is on the Editorial Board of PLoS Medicine.

Author Contributions

ICMJE criteria for authorship read and met: SE SK LB EA YBS TL LR RCA PJ SMD MM GDS DP KSR. Agree with the manuscript's results and conclusions: SE SK LB EA YBS TL LR RCA PJ SMD MM GDS DP KSR. Designed the experiments/the study: SE SK YBS GDS DP KSR. Analyzed the data: LB EA LR. Collected data/did experiments for the study: LB TL LR RCA PJ SMD MM DP. Enrolled patients: PJ SMD MM. Wrote the first draft of the paper: SE. Contributed to the writing of the paper: SK LB EA YBS PJ GDS DP. Study co-investigator; contributed to the study design, management of the fieldwork, staff training and supervision, data interpretation, and drafting of the paper: SK. Contributed to the coordination of the study, supervision of field team, and abstraction of data: TL. Contributed to interpretation of data: PJ.