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. 2021 Apr 9;23(4):e16651. doi: 10.2196/16651

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©Jonathan Austrian, Felicia Mendoza, Adam Szerencsy, Lucille Fenelon, Leora I Horwitz, Simon Jones, Masha Kuznetsova, Devin M Mann. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 09.04.2021.

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 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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Tobacco financial messaging alert with both images (no smoking sign and dollar sign) tested in Round 3 of the randomized controlled trial. Copyright 2020, Epic Systems Corporation.