a, Schematic outline of the experimental approach. b, Relative frequencies of structural cell types based on flow cytometry. c, Expression of surface markers among structural cells, comparing the standardized sorting of endothelium, epithelium and fibroblasts to potential alternative markers (left: schematic outline; centre: heat maps showing marker overlap; right: illustrative FACS plots). d, Expression of differentially regulated genes across cell types and organs. Gene clusters are annotated with enriched terms based on gene set analysis. e, Correlation of gene expression across cell types and organs. Sample size: n = 4 (b) and n = 3 (c–e) independent biological replicates.