Data and codes for this article: Wang X, Dong Y, Wu Z, Wang G, Shi Y, Zheng Y. Machine Learning-Based Comparative Analysis of Pan-Cancer and Pan-Normal Tissues Identifies Pan-Cancer Tissue-Enriched circRNAs Related to Cancer Mutations as Potential Exosomal Biomarkers. Front Oncol. 2021 Sep 15;11:703461. doi: 10.3389/fonc.2021.703461. PMID: 34604037; PMCID: PMC8479194.