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][1]." 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][2]." 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][3]." J Clin Epidemiol 68(6): 617-626. Rethlefsen and Koffel teamed up with Shona Kirtley to develop the [protocol for the PRISMA-S extension][4], initially published on the EQUATOR Network web site. It is also available in the Files section in the Protocol component of the PRISMA-S OSF project 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. [1]: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0163309 [2]: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0125931 [3]: https://www.sciencedirect.com/science/article/pii/S0895435615000578 [4]: http://www.equator-network.org/wp-content/uploads/2009/02/Protocol-PRISMA-S-Delphi.pdf