Fig. 2From: Targeting urine output and 30-day mortality in goal-directed therapy: a systematic review with meta-analysis and meta-regressionRisk of bias assessment. Risk of bias assessment performed with the Cochrane Collaboration tool [16]. Because there are two studies by Bisgaard et al. published in 2013, 1 marks reference [35], and 2 marks reference [56]. Gray circle: low risk of bias; blank: unclear risk of bias; white circle: high risk of biasBack to article page