Published on in Vol 9, No 5 (2021): May
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/26469, first published
.

1 Department of Biomedical Engineering, Chonnam National University, Yeosu, Korea, Republic of
2 BLACKYAK Co Ltd, Seoul, Korea, Republic of
*these authors contributed equally