Published on in Vol 22, No 9 (2020): September
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/19668, first published
.
1 Department of Radiation Oncology, The Affiliated Huaian No.1 People's Hospital of Nanjing Medical University, Jiangsu province, Huaian, China