%0 Journal Article %J Acceptance of Commercially Available Wearable Activity Trackers Among Adults Aged Over 50 and With Chronic Illness: A Mixed-Methods Evaluation %D 2016 %T JMIR mHealth and uHealth %A Kathryn Mercer %A Lora Giangregorio %A Eric Schneider %A Parmit Chilana %A Melissa Li %A Kelly Grindrod %B Acceptance of Commercially Available Wearable Activity Trackers Among Adults Aged Over 50 and With Chronic Illness: A Mixed-Methods Evaluation %G eng