Fig. 2From: Efficacy and safety of mesenchymal stem cells co-infusion in allogeneic hematopoietic stem cell transplantation: a systematic review and meta-analysisRisk of Bias (RoB) judgment. RoB assessments for the included a) six RCTs and b thirteen nRCTs. Green sign means low RoB, yellow sign means unclear RoB, red sign means high RoBBack to article page