Assessing risk of bias in randomised clinical trials included in Cochrane Reviews: the why is easy, the how is a challenge.

@article{Hrbjartsson2013AssessingRO,
  title={Assessing risk of bias in randomised clinical trials included in Cochrane Reviews: the why is easy, the how is a challenge.},
  author={Asbj\orn Hr{\'o}bjartsson and Isabelle Boutron and Lucy Turner and Douglas G. Altman and David Moher},
  journal={The Cochrane database of systematic reviews},
  year={2013},
  volume={4},
  pages={ED000058}
}