CTSL and neoplasm: In agreement with the mixed normal and tumor datasets, PBMC displayed positive correlations between ACE2/TMPRSS2, TMPRSS2/FURIN, ACE2/TFRC, FURIN/TFRC, TMPRSS2/CTSL, FURIN/CTSL, TMPRSS2/MYC, and FURIN/AKT1 and a negative association between ACE2/ADAM17.