Combining Persuasive System Design Principles and Behavior Change Techniques in Digital Interventions Supporting Long-term Weight Loss Maintenance: Design and Development of eCHANGE

¹ Center for eHealth and Wellbeing Research , Department of Psychology, Health and Technology , University of Twente , Enschede , NL

² Research and Innovation Department , Vestfold Hospital Trust , Tønsberg , NO

³ Department of Digital Health Research , Division of Medicine , Oslo University Hospital , Oslo , NO

⁴ Morbid Obesity Center , Vestfold Hospital Trust , Tønsberg , NO

⁵ Department of Endocrinology, Morbid Obesity and Preventive Medicine , Institute of Clinical Medicine , University of Oslo , Oslo , NO

⁶ Collaborative Care Unit , Sørlandet Hospital Trust , Kristiansand , NO

⁷ Research Group IT Innovations in Health Care , Windesheim University of Applied Sciences , Zwolle , NL

⁸ Department of Psychiatry & Psychology , College of Medicine & Science , Mayo Clinic , Rochester , MN , US

⁹ University of Waterloo , Waterloo , ON , CA

¹⁰ Institute of Clinical Medicine , Faculty of Medicine , University of Oslo , Oslo , NO

*these authors contributed equally