Horio Y, Uchino M, Tomoo Y, Nomura K, Nagano K, Kusunoki K, Kuwahara R, Kimura K, Sato T, Kataoka K, Igeta M, Shinzaki S, Ikeda M, Ikeuchi H. Preoperative performance status was associated with postoperative fatal complications in elderly patients with refractory ulcerative colitis. World J Gastrointest Surg 2025; 17(8): 109326 [PMID: 40949376 DOI: 10.4240/wjgs.v17.i8.109326]