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. 2021 Feb 5;5(2):e20464. doi: 10.2196/20464

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©Casey Anne Cole, Shannon Powers, Rachel L Tomko, Brett Froeliger, Homayoun Valafar. Originally published in JMIR Formative Research (http://formative.jmir.org), 05.02.2021.

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

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Correlations of individual interpuff intervals (IPIs) collected via the Clinical Research Support System (CReSS) device and Automated Smoking PerceptIon and REcording (ASPIRE) for participants (A) P15, (B) P19, (C) P7, and (D) P17.