766 A clinical trial to evaluate the safety, tolerability and preliminary efficacy of VG161 in combination with Nivolumab in patients with advanced pancreatic cancer by Tian Fang, Wei Song, Tingbo Liang, Xueli Bai, Yuwei Li, Qian Tan, Yinan Shen, Xingmei Liang, Xinyan Jin, Ronghua Zhao, Aijun Qin, Yiting Qiu