1. The University of Iowa; Great Plains Center for Agricultural Health; 103 IREH Oakdale Campus Iowa City Iowa USA 52242-5000
2. Cochrane Occupational Health Field; Finnish Institute of Occupational Health, Center of Expertise for Good Practices and Competence, Team of Knowledge Transfer in Occupational Health and Safety; P.O. Box 93 (Neulaniementie 4) Kuopio Finland 70701
3. Monash University; Accident Research Centre; Wellington Road Clayton VIC Australia 3800
4. University of Sydney; Faculty of Health Sciences; East St (PO Box 170) Lidcombe NSW Australia 2141
5. MTT Agrifood Research Finland; Economic Research; Luutnantintie 13 Helsinki Finland 00410
6. Finnish Institute of Occupational Health; Human Factors at Work; Topeliuksenkatu 41a A Helsinki Finland 00250