Fig. 1From: The effectiveness of creatine treatment for Parkinson’s disease: an updated meta-analysis of randomized controlled trialsAssessing the risk of bias of the included studies. a A summary of the authors’ evaluation of the risk of bias criteria for each included study; (b) A graph of the authors’ evaluation of each risk of bias criterion presented as percentages across all included studies Flow chart with inclusion criteria to select studies for this meta-analysisBack to article page