Obesity and Risk of Colorectal Cancer: A Systematic Review of Prospective Studies Ma, Yanlei ; Yang, Yongzhi ; Wang, Feng ; Zhang, Peng ; Shi, Chenzhang ; Zou, Yang ; Qin, Huanlong Abstract Publication: PLoS ONE Pub Date: January 2013 DOI: 10.1371/journal.pone.0053916 Bibcode: 2013PLoSO...853916M