Characteristics of Differently Located Colorectal Cancers Support Proximal and Distal Classification: A Population-Based Study of 57,847 Patients. oleh Jiao Yang, Xiang Lin Du, Shu Ting Li, Bi Yuan Wang, Yin Ying Wu, Zhe Ling Chen, Meng Lv, Yan Wei Shen, Xin Wang, Dan Feng Dong, Dan Li, Fan Wang, En Xiao Li, Min Yi, Jin Yang