Hanneke Kip works as an assistant professor at the Centre for eHealth and Wellbeing Research of the University of Twente and as a researcher at Transfore – a forensic psychiatric organization in the Netherlands. Nienke Beerlage-de Jong is an assistant professor at the section of Health Technology and Services Research at TechMed Centre of the University of Twente, the Netherlands. Lisette (J.E.W.C.) van Gemert-Pijnen is a full professor of persuasive health technology at the University of Twente, the Netherlands. Robbert Sanderman is emeritus professor and previously full professor and head of Health Psychology group at the Faculty of Medicine at the University Medical Centre Groningen. Saskia M. Kelders is an associate professor of engaging eHealth technologies at the Department of Psychology, Health and Technology at the University of Twente, Enschede, the Netherlands.