Page, MJ;    McKenzie, JE;    Bossuyt, PM;    Boutron, I;    Hoffmann, TC;    Mulrow, CD;    Shamseer, L;                                                                             ... Moher, D; + view all <#>        Page, MJ;  McKenzie, JE;  Bossuyt, PM;  Boutron, I;  Hoffmann, TC;  Mulrow, CD;  Shamseer, L;  Tetzlaff, JM;  Akl, EA;  Brennan, SE;  Chou, R;  Glanville, J;  Grimshaw, JM;  Hróbjartsson, A;  Lalu, MM;  Li, T;  Loder, EW;  Mayo-Wilson, E;  McDonald, S;  McGuinness, LA;  Stewart, LA;  Thomas, J;  Tricco, AC;  Welch, VA;  Whiting, P;  Moher, D;   - view fewer <#>    (2021)    The PRISMA 2020 statement: an updated guideline for reporting systematic reviews.                   Systematic Reviews , 10     , Article 89.  10.1186/s13643-021-01626-4 <https://doi.org/10.1186/s13643-021-01626-4>.       Green open access