Zhang Q, Wang XQ, Wang J, Cui SJ, Lou XM, Yan B, Qiao J, Jiang YH, Zhang LJ, Yang PY, Liu F. Upregulation of spondin-2 predicts poor survival of colorectal carcinoma patients. Oncotarget. 2015 Jun 20;6(17):15095–110. PMID: 25945835; PMCID: PMC4558138.