KIF18A and deep vein thrombosis: RT-qPCR results showed that CBT15_circR_28491 and CBT15_circR_6215 were significantly downregulated, whereas CBT15_circR_10888, CBT15_circR_40191, Kif18a, Cdca8, Nek2, and Ncapg were evidently upregulated in the DVT group.