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. 2024 Jun 10;26:e50049. doi: 10.2196/50049

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©Caroline Stellmach, Sina Marie Hopff, Thomas Jaenisch, Susana Marina Nunes de Miranda, Eugenia Rinaldi, The NAPKON, LEOSS, ORCHESTRA, and ReCoDID Working Groups. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 10.06.2024.

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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Flowchart describing the methodology of identifying common, standardized CRF variables reporting on diagnostic testing for use in infectious disease studies. CDE: common data element; CRF: case report form; ISARIC: International Severe Acute Respiratory and emerging Infection Consortium; LEOSS: Lean European Open Survey on SARS-CoV 2; mpox: monkeypox; NAPKON SUEP: Intersectoral Platform (SUEP) of the National Pandemic Cohort Network.