13.5.2  Guidance and resources available to support review authors

13.5.2.1 General considerations in assessing risk of bias in non-randomized studies

13.5.2.2 Confounding and adjustment

13.5.2.3 Tools for assessing methodological quality or risk of bias in non-randomized studies

13.5.2.4 Practical limitations in assessing risk of bias in non-randomized studies