Fig. 3From: Clinical benefits of PD-1/PD-L1 inhibitors in patients with metastatic colorectal cancer: a systematic review and meta-analysisQuality Assessment of included articles. This figure shows the result of assessing the included articles by “IHE’s quality appraisal checklist for assessing case-series studies.” A The detailed results of all 14 studies for the answers to the 20 questions in the checklist. B The distribution of answers for each question in the checklist. Y yes, U/P unclear/partial, N noBack to article page