1. Faculty of Medicine Carl Gustav Carus, TU Dresden; Institute and Policlinic of Occupational and Social Medicine; Fetscherstrasse 74 Dresden Germany 01307
2. Federal Institute for Occupational Safety and Health (BAuA); Division 3: Work and Health; Nöldnerstr. 40-42 Berlin Germany D-10317
3. Dutch Institute of Clinical Occupational Medicine; Hilversum Netherlands
4. Baylor Hamilton Heart and Vascular Hospital; Cardiac Rehabilitation Unit; 411 N Washington, Suite 3100 Dallas Texas USA 75218
5. Federal Institute for Occupational Safety and Health (BAuA); Evidence Based Medicine, OH Management; Nöldnerstr. 40-42 Berlin Germany D-10317