1. Healthy Working Lives Group, School of Health and Wellbeing, University of Glasgow , Glasgow G12 8TB , UK
2. Cordell Health Ltd , 13 Acorn Business Park, Northarbour Road, Portsmouth PO6 3TH , UK
3. University Hospital Leicester, Occupational Health Service, Baldwin Lodge, Glenfield Hospital , Groby Road, Leicester LE3 9QP , UK
4. Optima Health Ltd , Lakeside 300, Broadland Business Park, Norwich, Norfolk NR7 0WG , UK
5. Research Department of Primary Care and Population Health, UCL Medical School (Royal Free Campus) , Rowland Hill Street, London NW3 2PF , UK
6. Faculty of Occupational Medicine , 2 Lovibond Lane, London SE10 9FY , UK