CELF2 and nasopharyngeal carcinoma: By combining a total of 2, 237 cases, we found that rs3740194 at CELF2 locus was significantly associated with NPC overall survival rate and metastasis-free survival rate (both P < 0.001), and further consistently, rs3740194 at CELF2 locus was an independent prognostic factor for overall survival and metastasis-free survival.