Cell-specific mRNA expressions of ACE2, TMPRSS2, and CD147 in bladder, kidney, prostate, and testis. (A) Cell-specific expression of ACE2 from Human Cell Landscape Kidney2 (http://bis.zju.edu.cn/HCL/search.html); (B) Cell-specific expression of ACE2 from Human Cell Landscape Testis_Guo (http://bis.zju.edu.cn/HCL/search.html); (C) Cell-specific expression of TMPRSS2 from Human Cell Landscape Kidney2 (http://bis.zju.edu.cn/HCL/search.html); (D) Cell-specific expression of TMPRSS2 from Human Cell Landscape Prostate1 (http://bis.zju.edu.cn/HCL/search.html); (E) Cell-specific expression of TMPRSS2 from Human Cell Landscape Testis_Guo (http://bis.zju.edu.cn/HCL/search.html); (F) Cell-specific expression of CD147 from Human Cell Landscape Bladder1 (http://bis.zju.edu.cn/HCL/search.html); (G) Cell-specific expression of CD147 from Human Cell Landscape Kidney2 (http://bis.zju.edu.cn/HCL/search.html); (H) Cell-specific expression of CD147 from Human Cell Landscape Prostate1 (http://bis.zju.edu.cn/HCL/search.html); (I) Cell-specific expression of CD147 from Human Cell Landscape Testis_Guo (http://bis.zju.edu.cn/HCL/search.html). ACE2, angiotensin-converting enzyme 2; TMPRSS2, transmembrane serine protease 2; HPA, Human Protein Atlas; GTEx, the Genotype-Tissue Expression; FANTOM5, the Functional Annotation of The Mammalian Genome.