Tumor copy-number alterations predict response to immune-checkpoint-blockade in gastrointestinal cancer ======================================================================================================= * Zhihao Lu * Huan Chen * Shuang Li * Jifang Gong * Jian Li * Jianling Zou * Lihong Wu * Jianing Yu * Wenbo Han * Huaibo Sun * Xi Jiao * Xiaotian Zhang * Zhi Peng * Ming Lu * Zhenghang Wang * Henghui Zhang * Lin Shen