- Correspondence to Dr Jos Verbeek, Finnish Institute of Occupational Health, Survey and Review Team, PO Box 310, Fi-70101, Kuopio Finland;
- Received November 27, 2013
- Revised March 24, 2014
- Accepted March 30, 2014
- First published April 15, 2014.
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.