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Table 4 Quality assessment of the included studies in meta-analysis

From: The composition of lung microbiome in lung cancer: a systematic review and meta-analysis

Study Risk of bias assessment
  Selection
(0-4)
Comparability
(0-2)
Exposure
(0-3)
Quality score
Apopa et al. 3 2 3 8
Nejman et al. 3 1 3 7
Yu et al. 3 1 3 7
Kovaleva et al. 3 2 3 8