CCL27 and Behcet disease: Conversely, ILC counts and the frequency of ILC2 cells in BAL positively correlated with post-BD FEV1 (ρ = 0.669 and ρ = 0.669, respectively) and the frequency of ILC3 and Th1-IFNγ+ cells in blood negatively correlated with post-BD FEV1/FVC (ρ = -0.685 and ρ = -0.573, respectively).