Tumor‐associated N1 and N2 neutrophils predict prognosis in patients with resected pancreatic ductal adenocarcinoma: A preliminary study - Hanlin Yin; Shanshan Gao; Qiangda Chen; Siyao Liu; Sami Shoucair; Yuan Ji; Wenhui Lou; Jun Yu; Wenchuan Wu; Ning Pu (MedComm, 2022)