Published on in Vol 22, No 6 (2020): June
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19455, first published
.
1 The Institute for Social Data Science, Pohang University of Science and Technology, Pohang, Republic of Korea
2 National Cancer Control Institute, National Cancer Center, Goyang, Republic of Korea
3 Department of Family Medicine, National Cancer Center, Goyang, Republic of Korea