Darcy Ummels

Chapter 2 Counting steps in activities of daily living in people with a chronic disease using nine commercially available fitness trackers: cross ‐ sectional validity study Darcy Ummels, Emmylou Beekman, Kyra Theunissen, Susy Braun, Anna J Beurskens JMIR Mhealth Uhealth 2018;6(4):e70