@misc{misc, title = {{Older Adults' Use of Physical Activity Monitors in an 18-Month Trial: Descriptive Study of Technical Problems and Assistance (Preprint)}}, url = {{http://dx.doi.org/10.2196/preprints.47891 }}, year = {{2023}}, month = {{4}}, author = {{Choma EA and Hayes S and Lewis BA and Wyman JF and Rothman AJ and Guan W and McMahon S}}, doi = {{10.2196/preprints.47891}}, note = {{Accessed on 2025/04/09}}}