- Correspondence to Wilco Perini, Department of Public Health, Academic Medical Center of the University of Amsterdam, Amsterdam 1105 AZ, The Netherlands;
- Received February 7, 2018
- Revised April 10, 2018
- Accepted April 23, 2018
- First published May 5, 2018.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.