To Evaluate 1 Year Extension Study of the Efficacy and Safety of Tocilizumab in Patients With Moderate to Severe Rheumatoid Arthritis

Study Summary

The purpose of this study is to evaluate 1 year extension study of the efficacy and the safety during treatment tocilizumab in patients completing treatment CWP-TCZ301 study with moderate to severe active RA and an inadequate response to current DMARD.