- Correspondence to Dr Rui Wang-Sattler, Research unit of Molecular Epidemiology, Institute of Epidemiology II, Helmholtz Zentrum München, Ingolstädter Landstr. 1, Neuherberg 85764, Germany;
- Received 21 October 2016
- Revised 30 January 2017
- Accepted 3 February 2017
- Published in print 1 March 2017.
- Published online 2 March 2017.
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