- Correspondence to Polina Putrik, Department of Health Promotion and Education, Maastricht University, Peter Debyeplein 1, Maastricht 6229HA, The Netherlands;
- Received August 31, 2012
- Revised November 27, 2012
- Accepted December 24, 2012
- First published March 6, 2013.
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.