Gene expression studies performed by Choi et al. (2006) indicated that CCR7 mRNA levels were markedly increased in IPF as compared to normal lung biopsies in contrast to the CCR7 ligands, CCL19, and CCL21, which were similar in the two biopsies (Choi et al., 2006). The gene discussed is CCL21; the disease is idiopathic pulmonary fibrosis.