Characteristics of Participants and Nonparticipants in a Blended Internet-Based Physical Activity Trial for Breast and Prostate Cancer Survivors: Cross-sectional Study
vd Wiel, Hester J; Stuiver, Martijn M (Lectoraat Functioneel Herstel Bij Kanker); May, Anne M; van Grinsven, Susan; Benink, Marlou F A; Aaronson, Neil K; Oldenburg, Hester S A; van der Poel, Henk G; van Harten, Wim H; Groen, Wim G