- Correspondence to Dr Susanna C Larsson, Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Box 210, Stockholm 17177, Sweden;
- Received 20 January 2015
- Revised 12 July 2015
- Accepted 19 July 2015
- Published in print 19 October 2015.
- Published online 2 November 2015.
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