. 2019 Nov 21;7(11):e12442. doi: 10.2196/12442
©Isa Rudolf, Katharina Pieper, Helga Nolte, Sibylle Junge, Christian Dopfer, Annette Sauer-Heilborn, Felix C Ringshausen, Burkhard Tümmler, Ute von Jan, Urs-Vito Albrecht, Jan Fuge, Gesine Hansen, Anna-Maria Dittrich. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 21.11.2019.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mhealth and uhealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.