1. Public Health Institute Liverpool John Moores University Liverpool UK
2. Research Unit for Musculoskeletal Function and Physiotherapy University of Southern Denmark Odense Denmark
3. The Research Unit PROgrez Næstved‐Slagelse‐Ringsted Hospitals Slagelse Denmark
4. National Drug and Alcohol Research Centre University of New South Wales Sydney Kensington Australia
5. Nuffield Department of Primary Care Health Sciences University of Oxford Oxford UK
6. Institute of Applied Health Sciences University of Aberdeen Aberdeen Scotland, UK
7. Medical Statistics Team University of Aberdeen Aberdeen Scotland, UK
8. Health Behaviour Research Centre, Department of Epidemiology and Public Health University College London London UK
9. Health Services Research Unit University of Aberdeen Aberdeen Scotland UK
10. Centre for Behaviour Change University College London London UK
11. IQ Healthcare, Institute of Health Sciences Radboud University Medical Center Nijmegen the Netherlands