Comparison of response evaluation criteria in solid tumors and tumor regression grade in evaluating the effect of preoperative systemic therapy of gastric cancer oleh Ming-Yu Lai, Shi-Yang Kang, Yu-Ting Sun, Ting-Ting Quan, Shi-Xun Lu, Cai-Yun He, Zhi-Wei Zhou, Li-Qiong Yang, Hui-Yan Luo, Feng-Hua Wang, Yu-Hong Li, Rui-Hua Xu, Wen-Long Guan, Miao-Zhen Qiu