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This article refers to: Yamamoto H, Nakanishi Y, Mitsuhashi T, et al. Impact of neutrophil extracellular traps identified by citrullinated histone H3 immunohistochemistry for postoperative prognosis in patients with extrahepatic cholangiocarcinomas. Ann Surg Oncol. (2023). https://doi.org/10.1245/s10434-023-14638-2