Kestens, Y; Thierry, B; Shareck, M; Steinmetz-Wood, M; Chaix, B; (2018) Integrating activity spaces in health research: Comparing the VERITAS activity space questionnaire with 7-day GPS tracking and prompted recall. Spatial and spatio-temporal epidemiology. ISSN 1877-5845 DOI: https://doi.org/10.1016/j.sste.2017.12.003