@article{page2021,
  title={The PRISMA 2020 statement: an updated guideline for reporting systematic reviews},
  author={Matthew J. Page and Joanne E. McKenzie and Patrick M. Bossuyt and Isabelle Boutron and Tammy Hoffmann and Cynthia D. Mulrow and Larissa Shamseer and Jennifer Tetzlaff and Elie A. Akl and Sue Brennan and Roger Chou and Julie Glanville and Jeremy Grimshaw and Asbjørn Hróbjartsson and Manoj M. Lalu and Tianjing Li and Elizabeth Loder and Evan Mayo‐Wilson and Steve McDonald and Luke A. McGuinness and Lesley Stewart and James Thomas and Andrea C. Tricco and Vivian Welch and Penny Whiting and David Moher},
  year={2021},
  journal={BMJ},
  doi={10.1136/bmj.n71},
  url={https://doi.org/10.1136/bmj.n71}
}