- Correspondence to: Dr M Lahtinen Finnish Institute of Occupational Health, Uusimaa Regional Institute, Arinatie 3 a, FIN-00370 Helsinki, Finland;
- Accepted March 31, 2003
- First published January 22, 2004.
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.