Published on in Vol 21 , No 4 (2019) :April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/12300, first published
.

1 Department of Informatics, Technical University of Munich, Garching, DE
2 Department of Medical Informatics, Uniklinik Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, DE