This is a observational study, single center, open label, study of safety of FURESTEM-RA Inj. in subjects with moderate to severe rheumatoid arthritis.~Subjects participating in this observational study originally participated in study FURESTEM-RA Inj.~[NCT02221258]
Observational Study to evaluate the safety of FURESTEM-RA lnj. in moderate to severe rheumatoid arthritis patients who participated in phase 1 clinical trial of FURESTEM-RA lnj.