@article{group2015,
  title={Preferred reporting items for systematic review and meta-analysis protocols (PRISMA-P) 2015 statement},
  author={PRISMA-P Group and David Moher and Larissa Shamseer and Mike Clarke and Davina Ghersi and Alessandro Liberati and Mark Petticrew and Paul Shekelle and Lesley Stewart},
  year={2015},
  journal={Systematic Reviews},
  doi={10.1186/2046-4053-4-1},
  url={https://doi.org/10.1186/2046-4053-4-1}
}