- Correspondence to Dr Linda M O'Keeffe Cardiovascular Epidemiology Unit, University of Cambridge, Strangeways Research Laboratory, Cambridge CB1 8RN, United Kingdom;
- Received 7 August 2014
- Revised 26 November 2014
- Accepted 27 November 2014
- Published online 6 July 2015.
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- Data supplement 1 - Online supplement
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