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. 2021 Oct 20;23(10):e29218. doi: 10.2196/29218

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©Martinus C Oppelaar, Lara S van den Wijngaart, Peter J F M Merkus, Ellen A Croonen, Cindy A C Hugen, Marianne L Brouwer, Annemie L M Boehmer, Jolt Roukema. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 20.10.2021.

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 https://www.jmir.org/, as well as this copyright and license information must be included.

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Screenshot of the graphical presentation of FEV₁ measurements on the online eHealth platform of one of the participants. Language is in Dutch. Colors represent individual color zones (green, orange, red).