1. Health Psychology Group, Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, United Kingdom.;
2. Rowett Institute, University of Aberdeen, Aberdeen, United Kingdom.;
3. Department of Clinical Psychology and Experimental Psychopathology, University of Groningen, Groningen, the Netherlands.;
4. Health Services Research Unit, Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, United Kingdom.;
5. Nuffield Department of Primary Care Health Sciences and National Institute of Health Research Oxford Biomedical Research Centre, University of Oxford, Oxford, United Kingdom.;
6. Centre for Behaviour Change, University College London, London, United Kingdom
7. Department of Behavioural Science and Health, University College London, London, United Kingdom
8. Technology Addiction Team, Brain and Mind Centre, University of Sydney, Australia.;
9. Radboud University Medical Center, Radboud Institute for Health Sciences, IQ Healthcare, Nijmegen, the Netherlands.