HOXA10 and head and neck squamous cell carcinoma: The LINC00520/miR-195/HOXA10 axis can up-regulate the expression of invasion and migration factors (MMP2 and MMP9) and anti-apoptotic factor Bcl-2, and down-regulate the expression of apoptotic factor Bax, which ultimately promotes cell proliferation, invasion, and metastasis of HNSCC (19).