Back to profile Publications - dr. AF (Ayla) Schwarz The most important publications (highlighted by the author). Design Features Associated With Engagement in Mobile Health Physical Activity Interventions Among Youth: Systematic Review of Qualitative and Quantitative Studies Schwarz, A., Winkens, L. H., de Vet, E., Ossendrijver, D., Bouwsema, K., & Simons, M. (2023) JMIR mHealth and uHealth