Reactivity to smartphone-based ecological momentary assessment of depressive symptoms (MoodMonitor) protocol of a randomised controlled trial - Ballegooijen, Wouter van; Ruwaard, Jeroen; Karyotaki, Eirini; Ebert, David D.; Smit, Johannes H.; Riper, Heleen (Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2016)