To investigate the role of NR2F2 in the pathogenesis of pulmonary fibrosis in vivo, we induced overexpression of Nr2f2 in the lungs of C57/BL6N mice by intratracheal instillation of Adeno-associated virus serotype (AAV)2/9 or AAV2/9-Nr2f2 7 days before exposure to 1.5 U/kg bleomycin (Fig. 6A). The gene discussed is NR2F2; the disease is pulmonary fibrosis.