Published on in Vol 9, No 10 (2020): October
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/22679, first published
.

1 Clinical Research Unit, National Healthcare Group Polyclinics , Singapore , SG
2 Geriatric Education and Research Institute , Singapore , SG
3 Department of Geriatric Medicine, Tan Tock Seng Hospital , Singapore , SG