- Correspondence to Dr Antonis C Antoniou, Strangeways Research Laboratory, Department of Public Health and Primary Care, Worts Causeway, Cambridge CB1 8RN, UK;
- Received February 17, 2015
- Revised April 2, 2015
- Accepted April 8, 2015
- First published May 29, 2015.
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- Data supplement 1 - Online supplement
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