TUG1 and cervical squamous intraepithelial neoplasia: A search of the Gene Expression Omnibus (GEO) database (http://www.ncbi.nlm.nih.gov/gds/) using the Oncomine Platform (https://www.oncomine.org/resource/login.html) revealed that TUG1 expression increased gradually during tumorigenesis from normal tissue to CIN and subsequently, to cervical cancer (Fig. S2).