AUTHOR=Moretti Felipe , Bortolini Tiago , Hartle Larissa , Moll Jorge , Mattos Paulo , Furtado Daniel R. , Fontenelle Leonardo , Fischer Ronald TITLE=Engagement challenges in digital mental health programs: hybrid approaches and user retention of an online self-knowledge journey in Brazil JOURNAL=Frontiers in Digital Health VOLUME=6 YEAR=2024 URL=https://www.frontiersin.org/journals/digital-health/articles/10.3389/fdgth.2024.1383999 DOI=10.3389/fdgth.2024.1383999 ISSN=2673-253X