CXCR3 and sarcoidosis: We have recently found that CXCR3 is expressed in vivo by CD4+ Th1 infiltrating the lung of patients with sarcoidosis and by T cells accumulating in the pulmonary parenchyma of lung-transplant recipients with rejection episodes [9,10], providing evidence that CXCR3 expression constitutes an important mechanism in the regulation of T-cell migration to the lung.