A Smartphone App Combining Global Positioning System Data and Ecological Momentary Assessment to Track Individual Food Environment Exposure, Food Purchases, and Food Consumption: Protocol for the Observational FoodTrack Study.
Maartje P PoelmanFrank J van LentheSimon ScheiderCarlijn Bm KamphuisPublished in: JMIR research protocols (2020)
DERR1-10.2196/15283.