JMIR Formative Res: Objectively Measured Life Space Using Participants’ Mobile Phones: Cross-Sectional Study #LifeSpace #MobileHealth #GPS #OlderAdults #ResearchStudy

JMIR Formative Res: Objectively Measured Life Space Using Participants’ Mobile Phones: Cross-Sectional Study #LifeSpace #MobileHealth #GPS #OlderAdults #ResearchStudy