Page, M. J., McKenzie, J. E., Bossuyt, P. M., Boutron, I., 
Hoffmann, T. C., Mulrow, C. D., ... & Moher, D. (2021). The 
PRISMA 2020 statement: an updated guideline for reporting 
systematic reviews. bmj, 372.

Abstract
To describe the processes used to update the PRISMA 2009 
statement for reporting systematic reviews, present results 
of a survey conducted to inform the update, summarize decisions 
made at the PRISMA update meeting, and describe and justify 
changes made to the guideline.