VRK1 and esophageal squamous cell carcinoma: Some other circRNA–miRNA networks, such as CircRNA-100367–miR-21716, CircRNA–ciRS7–miR-728, CircRNA-0006948–miR-49029, and circ-VRK1–miR-62430, were reported to play critical roles in the pathogenesis of pro-ESCC or anti-ESCC.