- Correspondence to Professor Åse Marie Hansen, Department of Public Health, University of Copenhagen, Østre Farimagsgade 5, Copenhagen K DK-1014, Denmark;
- Received February 23, 2015
- Revised November 25, 2015
- Accepted December 22, 2015
- First published January 14, 2016.
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.