TGFBR1 and chronic rhinosinusitis with nasal polyps: In addition, we found an upregulation of mRNA expression of TGFBR1 and TGFBR2 in nasal epithelial cells from patients with CRSsNP, but no change was found in epithelial cells from patients with eosinophilic or noneosinophilic CRSwNP, compared with controls (Supplemental Figure 8).