Published on in Vol 7, No 2 (2019): Apr-Jun
                                    Preprints (earlier versions) of this paper are
                                    available at
                                    https://preprints.jmir.org/preprint/12561, first published
                                    .
                                

1 Department of Electrical and Computer Engineering, School of Engineering and Technology, Indiana University Purdue University, Indianapolis, IN, United States
2 Eli Lilly and Company, Indianapolis, IN, United States
*all authors contributed equally
