Impact of terminal ileal microbiota dysbiosis and tryptophan metabolism alterations on mental disorders in patients with Crohn's disease. - Lin, Yin; Wang, Fang-Tao; Xia, Kai; Gao, Ren-Yuan; Jiao, Yi-Ran; Fang, Min; Chen, Chun-Qiu (BMC Gastroenterology, 2025)