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. 2023 Feb 1;7:e43557. doi: 10.2196/43557

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©Christine d'Offay, Xin Yi Ng, Laura Alexander, Alison Grant, Julia Grahamslaw, Claudia Pagliari, Matthew J Reed, Alan Carson, David C Gillespie, Aimun A B Jamjoom. Originally published in JMIR Formative Research (https://formative.jmir.org), 01.02.2023.

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 Formative Research, is properly cited. The complete bibliographic information, a link to the original publication on https://formative.jmir.org, as well as this copyright and license information must be included.

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(A) The percentage of study participants completing the symptom diary. (B) Distribution of the symptom burden based on 494 symptom diary responses. (C) Temporal change in symptom burden over the course of HeadOn.