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. 2019 Oct 10;21(10):e14037. doi: 10.2196/14037

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©Margreet Worm-Smeitink, Arno van Dam, Saskia van Es, Rosalie van der Vaart, Andrea Evers, Michel Wensing, Hans Knoop. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 10.10.2019.

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 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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Flowchart. CBT: cognitive behavioral therapy; CFS: chronic fatigue syndrome; f2f: face-to-face; I-CBT: internet-based cognitive behavioral therapy; ICF: idiopathic chronic fatigue.