. 2020 Dec 22;9(12):e25051. doi: 10.2196/25051
©Slavko Rogan, Eefje Luijckx, Jan Taeymans, Karin Haas, Heiner Baur. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 22.12.2020.
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 Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on http://www.researchprotocols.org, as well as this copyright and license information must be included.
Figure 1.
Flow diagram of the study.