TY - GEN T1 - Older Adults' Use of Physical Activity Monitors in an 18-Month Trial: Descriptive Study of Technical Problems and Assistance (Preprint) T2 - JMIR Publications Inc. UR - http://dx.doi.org/10.2196/preprints.47891 PY - 2023/04/04 AU - Choma EA AU - Hayes S AU - Lewis BA AU - Wyman JF AU - Rothman AJ AU - Guan W AU - McMahon S ED - DO - DOI: 10.2196/preprints.47891 Y2 - 2025/05/21 ER -