%0 Journal Article %K bias %K Blinding %K critical appraisal %K External validity %K Internal validity %K Quality assessment %K risk of bias %K Systematic error %K Validity %B Environmental Evidence %D 2022 %P 12 %R 10.1186/s13750-022-00264-0 %T Principles and framework for assessing the risk of bias for studies included in comparative quantitative environmental systematic reviews %U https://doi.org/10.1186/s13750-022-00264-0 %V 11 %8 2022-03-29