- Correspondence to Professor Johan P Mackenbach, Department of Public Health, Erasmus MC, PO Box 2040, Rotterdam 3000 CA, The Netherlands;
- Received 14 October 2015
- Revised 4 March 2016
- Accepted 31 March 2016
- Published in print 1 May 2017.
- Published online 19 April 2017.
- Published first 27 April 2016.
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