- Correspondence to Dr Raphaëlle Varraso, INSERM U1168, Aging and Chronic Diseases, Epidemiological and Public Health Approaches, Villejuif 94807, France;
- Received 6 December 2016
- Revised 4 January 2017
- Accepted 6 January 2017
- Published in print 27 January 2017.
- Published online 22 February 2017.
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