- Correspondence to Dr Thomas Clausen, National Research Centre for the Working Environment, Lersoe Parkalle 105, Copenhagen DK-2100, Denmark;
- Received November 16, 2012
- Revised March 19, 2013
- Accepted April 29, 2013
- First published June 17, 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.