Fig. 1

Concentrations of sPD-1 in patients with rheumatoid arthritis (RA) and Healthy controls (HC) (A) and their relationship between anti-CCP (B), rheumatoid factor (RF) (C) and IgG (D)
Concentrations of sPD-1 in patients with rheumatoid arthritis (RA) and Healthy controls (HC) (A) and their relationship between anti-CCP (B), rheumatoid factor (RF) (C) and IgG (D)