CCR4 and interstitial lung disease: To evaluate the contribution of the pulmonary Th1/Th2 micromilieu to the pathogenesis of pediatric ILD, CCR4+ and CCR3+ (Th2) and CCR5+ and CXCR3+ (Th1) cells were determined in BALF together with an array of pulmonary Th1- and Th2-associated cytokines.