Published on in Vol 22, No 7 (2020): July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/16644, first published
.
1 School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
2 Jinan Shizhong People’s Hospital, Jinan, China
3 Jinan Central Hospital, Jinan, China
4 Peking University Health Science Center, Beijing, China