Fig. 2From: ERCC2 polymorphisms and radiation-induced adverse effects on normal tissue: systematic review with meta-analysis and trial sequential analysisMeta-analysis between ERCC2 polymorphisms and risk of radiotoxicity. A fixed-effects model was used. The square with the corresponding horizontal line represents the OR and 95 % CI of each study. The area of the square reflects the weight of the study. The diamond represents the pooled OR and 95 % CI. Power listed in the graph was calculated at the level of the corresponding ORBack to article page