Social Support Patterns of Middle-Aged and Older Adults Within a Physical Activity App: Secondary Mixed Method Analysis.
Zakkoyya H LewisMaria Chang SwartzEloisa MartinezElizabeth J LyonsPublished in: JMIR aging (2019)
ClinicalTrials.gov NCT01869348; https://clinicaltrials.gov/ct2/show/NCT01869348.