Adding Mobile Elements to Online Physical Activity Interventions Targeted at Adults Aged 50 Years and Older: Protocol for a Systematic Design.
Eline H G M CollombonCatherine Adriana Wilhelmina BolmanDenise Astrid PeelsGert-Jan de BruijnRenate H M de GrootLilian LechnerPublished in: JMIR research protocols (2022)
DERR1-10.2196/31677.