Fig. 1From: Intraindividual changes of dipeptidyl peptidase-IV in peripheral blood of patients with rheumatoid arthritis are associated with the disease activityBlood plasma DPP-IV-like enzymatic activity and concentration in RA and OA patients. In the box plots, the medians are depicted as small squares, interquartile range (25–75th centile) as boxes and bars extend from the minimum to maximum values. *p < 0.001, Mann–Whitney U testBack to article page