Kristien Selis1, Hilde Vanacker2, Veerle Hermans3, Godewina Mylle4, Herman Devriese5 and Kris Kerckhofs6 1Ergonomics Department, IDEWE, Heverlee, Belgium 2/4 Medical Department, IDEWE, Heverlee, Belgium, 3Vrije Universiteit Brussel, Work Psychology, Brussels, Belgium 5Prevention Department, University Hospital Leuven, Leuven, Belgium, 6Training Department, University Hospital Leuven, Leuven, Belgium