PRISMA-S has been published in [Systematic Reviews]; it will be jointly published in Journal of the Medical Library Association in the April 2021 issue. **The Checklist versions available below** (dated March 2020), as well as Additional File 1 (dated November 2020), are final versions. **If you would like to translate the PRISMA-S checklist**, please see PRISMA's official [translation policy]. The PRISMA-S Extension project began in 2015. The Delphi process and consensus conference took place in 2016. The draft of the PRISMA-S Checklist and Explanation & Elaboration documents are currently in review. The need for a specific extension for search reporting was made clear through many studies regarding the irreproducibility of searches, including in this study by Jonathan Koffel and Melissa Rethlefsen: - Koffel, J. B. and M. L. Rethlefsen (2016). "[Reproducibility of Search Strategies Is Poor in Systematic Reviews Published in High-Impact Pediatrics, Cardiology and Surgery Journals: A Cross-Sectional Study]." PLoS One 11(9): e0163309. This study built on and confirmed work by Rethlefsen, Farrell, Trazsko-Osterhaus, and Brigham and Koffel: - Koffel, J. B. (2015). "[Use of recommended search strategies in systematic reviews and the impact of librarian involvement: a cross-sectional survey of recent authors]." PLoS One 10(5): e0125931. - Rethlefsen, M. L., et al. (2015). "[Librarian co-authors correlated with higher quality reported search strategies in general internal medicine systematic reviews]." J Clin Epidemiol 68(6): 617-626. Rethlefsen and Koffel teamed up with Shona Kirtley to develop the [protocol for the PRISMA-S extension], initially published on the EQUATOR Network web site. Data from the Delphi survey process, the consent cover letters, the survey tools, and more will be available on the OSF site for PRISMA-S. : https://doi.org/10.1186/s13643-020-01542-z : http://prisma-statement.org/Translations/TranslationsPolicy : https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0163309 : https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0125931 : https://www.sciencedirect.com/science/article/pii/S0895435615000578 : http://www.equator-network.org/wp-content/uploads/2009/02/Protocol-PRISMA-S-Delphi.pdf
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