Fig. 2From: Stem cell therapies for periodontal tissue regeneration: a network meta-analysis of preclinical studiesQuality assessment of each risk of bias item presented as percentages across all included studies. The horizontal axis indicates the percentage of answers to the questions in the SYRCLE risk of bias tool. Each color represents a different level of bias: red for a high-risk, green for a low-risk, and yellow for an unclear risk of biasBack to article page