- Correpondence to Michelle A Morris, Nutritional Epidemiology Group, School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK;
- Received 16 February 2014
- Revised 27 June 2014
- Accepted 30 June 2014
- Published in print 1 November 2014.
- Published online 1 October 2014.
- Published first 22 July 2014.
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