Evaluation of an Interactive Web-Based Application to Promote Healthy Behavior in Order to Maintain a Healthy Weight - Preliminary Findings. - Saskia M. Kelders; Susanne Kerkhof; Julia E. W. C. van Gemert-Pijnen; Erwin R. Seydel; Fleur Markus; Andrea Werkman (eTELEMED, 2009)