Pharmacological management of upper gastrointestinal Crohn's disease: a systematic review. - Chatto M; Alaskar D; Ma C; Yuan Y; Vuyyuru SK; Bessissow T; Narula N; Danese S; Peyrin-Biroulet L; Singh S; Jairath V; Sedano R (Journal of Crohn's & colitis, 2025)