Interferon gamma inhibits CXCL8–CXCR2 axis mediated tumor-associated macrophages tumor trafficking and enhances anti-PD1 efficacy in pancreatic cancer ======================================================================================================================================================== * Mingjie Zhang * Lifeng Huang * Guoping Ding * Huilian Huang * Guoliang Cao * Xu Sun * Neng Lou * Qiang Wei * Tao Shen * Xiaodong Xu * Liping Cao * Qiang Yan