1. Health Psychology Group, Institute of Applied Health Sciences University of Aberdeen Aberdeen Scotland, UK
2. Research Unit for Musculoskeletal Function and Physiotherapy, Department of Sports Science and Clinical Biomechanics University of Southern Denmark Odense Denmark
3. The Research Unit PROgrez, Department of Physiotherapy and Occupational Therapy, Næstved‐Slagelse‐Ringsted Hospitals, Slagelse, Denmark Slagelse Denmark
4. Public Health Institute Liverpool John Moores University Liverpool UK
5. Medical Statistics Team, Institute of Applied Health Sciences University of Aberdeen Aberdeen Scotland, UK
6. Health Services Research Unit University of Aberdeen Aberdeen Scotland, UK
7. Technology Addiction Team, Brain and Mind Centre University of Sydney Sydney Australia
8. Nuffield Department of Primary Care Health Sciences and National Institute for Health Research Oxford Biomedical Research Centre University of Oxford Oxford UK
9. Health Behaviour Research Centre, Department of Epidemiology and Public Health University College London London UK
10. Centre for Behaviour Change University College London London UK
11. Radboud Institute for Health Sciences, IQ Healthcare Radboud University Medical Centre Nijmegen the Netherlands