Extended D3 Mesenterectomy in Small Bowel Cancer Treatment: Feasibility and Importance for Staging. First Results of a Prospective Clinical Trial - Erik Kjæstad; Espen Thiis‐Evensen; Bjørn Edwin; Arne Olav Bakka; Anne Helene Lilleaas; Yngve Thorsen; Johannes Kurt Schultz (World Journal of Surgery, 2026)