Relationship between hospital surgical volume and the perioperative esophagectomy costs for esophageal cancer: a nationwide administrative claims database study. - Sakamoto T; Nishigori T; Goto R; Kawakami K; Nakayama T; Tsunoda S; Hisamori S; Hida K; Obama K (Esophagus : official journal of the Japan Esophageal Society, 2025)