COL3A1 and urinary bladder cancer: Yuan, Lushun et al. [31] have reported that the overexpression of COL3A1 confers a poor prognosis in human bladder cancer in 2017.The DEGs used for WGCNA were obtained by comparing low stage bladder cancers (Ta-T1) and high stage bladder cancers (T2-T4) by Limma R packages, and hub genes were defined by module connectivity.