LRG1 and rheumatoid arthritis: Since the plasma LRG1 levels observed in RA patients in the present study is similar to previously reported values (median values: present study, 8.12 vs. previous study, 11.4 μg/ml), the difference between both studies lies in the LRG1 levels observed in HC subjects (median value: present study, 15.9 vs. previous study, 3.0 μg/ml).