Published on in Vol 7, No 4 (2019): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/11989, first published
.

1 National Taiwan University Hospital, Department of Surgery, National Taiwan University, Taipei , TW
2 Department of Surgery, College of Medicine, National Taiwan University , Taipei , TW
3 Graduate Institute of Biomedical Electronics and Bioinformatics , National Taiwan University, Taipei , TW
*these authors contributed equally