HIPK3 and cancer: Table S4 provides the classification results at the gene level with information of involved exons. Given our circRNAs classification, we observed that exonic circRNAs were the class associated with the highest expression and the circRNAs predicted on the HIPK3 (exon 2), CAMSAP1 (exons 2–3), and ASXL1 (exons 2–4) were the most expressed circRNAs in both normal and cancer cell lines (Table S4). These circRNAs were also identified by Jiang and coworkers as the most expressed circRNAs [40].