- Correspondence to CJG Kampman, Public Health Service Twente, Postbus 1400, Enschede 7511 JM, The Netherlands;
- Received April 1, 2015
- Revised August 31, 2015
- Accepted September 4, 2015
- First published September 24, 2015.
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.