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Simons, L.P.A. (author), van den Heuvel, Wouter A.C. (author), Jonker, C.M. (author)WhatsApp was evaluated as group support tool for a high impact healthy lifestyle intervention, with 11 young professionals. Users valued the WhatsApp group as an attractive social support addition to the existing eTools and personal coaching. Based on preliminary results: 1) the WhatsApp group generated higher participation than most other...journal article 2020