Published on in Vol 7, No 2 (2019): Apr-Jun
                                    Preprints (earlier versions) of this paper are
                                    available at
                                    https://preprints.jmir.org/preprint/13590, first published
                                    .
                                

1 Center for Evidence-Based Imaging, Brigham and Women's Hospital, Brookline, MA, United States
2 Harvard Medical School, Boston, MA, United States
3 Countway Medical Library, Harvard Medical School, Boston, MA, United States
*these authors contributed equally
