- Correspondence to Dr Susanna C Larsson, Unit of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm SE-17177, Sweden;
- Received 18 December 2015
- Revised 8 February 2016
- Accepted 11 February 2016
- Published in print 1 July 2016.
- Published online 10 June 2016.
- Published first 2 March 2016.
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