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Time of peritoneal cytology becoming negative. Peritoneal washing cytology specimens were examined in i.p.-PTX group patients who had a peritoneal access port. Patients were categorized into five groups based on the time of peritoneal cytology becoming negative (<2 months, ≥2 months to <3 months, ≥3 months to <4 months, ≥4 months to <6 months, and peritoneal cytology positive).
