1. Goedstrup Hospital, Department of Occupational Medicine - University Research Clinic , Herning , Denmark
2. VIA University College , Holstebro , Denmark
3. Aalborg University, Center for General Practice , Aalborg , Denmark
4. Central Denmark Region , Viborg , Denmark
5. Aarhus University, Department of Clinical Medicine , Aarhus , Denmark
6. Regional Hospital Central Jutland, Research, Heibergs Allé 2K , Viborg , Denmark