Zhai H, Fesler A, Schee K, Fodstad O, Flatmark K, Ju J. Clinical Significance of Long Intergenic Noncoding RNA-p21 in Colorectal Cancer. Clin Colorectal Cancer. 2013 Dec;12(4):261-6. doi: 10.1016/j.clcc.2013.06.003. Epub 2013 Sep 5.