IL2RB and rheumatoid arthritis: The percentages of CD3+CD122+ cells and of CD122 expression on NK cells were significantly lower in BD patients [CD3+CD122+: 5.32 ± 1.92%, P = 0.0001; CD122-NK cells: 60.70 ± 13.70, P = 0.0001] than in RA patients [CD3+CD122+: 18.50 ± 3.27%; CD122-NK cells: 92.83 ± 10.11%] and in healthy controls [CD3+CD122+: 15.10 ± 3.70%; CD122-NK cells: 84.80 ± 7.68%;].