Published on in Vol 22, No 4 (2020): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/18908, first published
.
1 The Internet Hospital of the First Affiliated Hospital of Xia'men University, Xia'men City, China
2 Zoenet Health Company Limited, Xia'men City, China