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. 2020 Jul 14;22(7):e15361. doi: 10.2196/15361

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©Caroline Oehler, Frauke Görges, Mandy Rogalla, Christine Rummel-Kluge, Ulrich Hegerl. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 14.07.2020.

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 the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Participant flow chart; a participant was counted as having completed 1 measurement point when either the telephone interview had taken place or the questionnaire had been filled out. Single measures might be reported with slightly differing sample sizes. PHQ: patient health questionnaire; PMR: progressive muscle relaxation; iFD: iFightDepression.