Prophylactic endoluminal vacuum-assisted therapy in high-risk ultra-low rectal anastomoses: a retrospective comparative study of feasibility and clinical outcomes - Nour Alkhanji; Eslam Elmaghraby; Saleh Lahes; Mohammed Abdulla; Wolfram Trudo Kneofel; Nadja C Lehwald-Tywuschik (BMC Surgery, 2026)