CXCR4 and idiopathic pulmonary fibrosis: In addition we report pockets of CXCR4 expression that lack co-localization with CXCL14 in IPF lungs (Fig. 6H) which confirms a widely observed trait in normal tissue sections (Fig. 6P,L,N), specfically this phenomon is most distinct in the airways of both normal (Fig. 6N) and IPF (Fig. 6H) sections.