Erratum to “Prognostic and Predictive Value of CpG Island Methylator Phenotype in Patients with Locally Advanced Nonmetastatic Sporadic Colorectal Cancer” - Yuwei Wang; Yadong Long; Ye Xu; Zuqing Guan; Peng Lian; Junjie Peng; Sanjun Cai; Guoxiang Cai (Gastroenterology Research and Practice)