A Novel Method to Detect Early Colorectal Cancer Based on Chromosome Copy Number Variation in Plasma oleh Jun-Feng Xu, Qian Kang, Xing-Yong Ma, Yuan-Ming Pan, Lang Yang, Peng Jin, Xin Wang, Chen-Guang Li, Xiao-Chen Chen, Chao Wu, Shao-Zhuo Jiao, Jian-Qiu Sheng