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. 2021 Apr 1;9(4):e24646. doi: 10.2196/24646

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©Lida Anna Apergi, Margret V Bjarnadottir, John S Baras, Bruce L Golden, Kelley M Anderson, Jiling Chou, Nawar Shara. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 01.04.2021.

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 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.

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Example of color display used in the monitoring of patients, as it appears in the email sent to the study nurse. Green indicates that the patient either complied with the corresponding instruction (columns 1-5) or did not have the corresponding symptom (columns 6-13), orange indicates that the patient gave a positive answer to the corresponding mild heart failure (HF) symptom question, and red indicates that the patient gave a positive answer to the corresponding moderate or severe HF symptom question. Gray indicates skip logic, meaning these questions were not required based on the previous answers.