To validate the presence of ACKR1 and PLVAP double-positive, CCL14-expressing endothelial cells, we analysed sc/snRNA-seq data from DCM and controls.15 Eight endothelial cell sub-clusters were identified (Figure 4H), with the ‘Endothelial cell vein PLVAP’ cluster co-expressing PLVAP, ACKR1, and CCL14 (Figure 4I and J). Here, CCL14 is linked to familial dilated cardiomyopathy.