[Risk on bias assessment: (2) Revised Cochrane risk of bias tool for individually randomized, parallel group trials (RoB2.0)].

This paper introduces the revised cochrane risk of bias tool for individually randomized, parallel group trials (RoB2.0), compates RoB2.0 and the previous version (RoB1.0). And illustrates the application of RoB2.0 for a published clinical trial. As a comprehensive tool, RoB2.0 provides more information on the risk of bias for evidence synthesis. RoB2.0 is still under development and it is suggested that the users should follow the updates of the developers in the future.