KLRB1 and rheumatoid arthritis: Both RA subjects and healthy controls showed similar frequencies of Th17 or Th1 cells in the CD161+ compartment (respectively 1.44 ± 0.55% vs. 1.33 ± 0.11%; P = 0.11; 13.81 ± 1.48% versus 12.79 ± 1.64%; P = 0.66) (Figure 2C).