NCAM1 and juvenile idiopathic arthritis: Through unbiased clustering and enumerating CD56+CD3− NK cells, we found total NK-cell numbers were not significantly altered in the inflamed joint compared to PB (%CD56 + CD3− of all live cells 8.1 ± 3.2 in SF vs 9.8 ± 1.2% HC PB, 9.3 ± 0.7% JIA PB, Fig. 3G).