Figure 1. Flowchart of data collection and analysis. Abbreviations: BLCA: Bladder urothelial carcinoma; TCGA: The Cancer Genome Atlas; KEGG: Kyoto Encyclopedia of Genes and Genomes; GO: Gene Ontology; lncRNAs: long noncoding RNAs; LASSO: least absolute shrinkage and selection operator; ROC: receiver operating characteristic; GSEA: gene enrichment analysis; ssGSEA: single-sample gene set enrichment analysis.