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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