C. de O. Matheus, J. Waisberg, M. H. de T. Zewer, and A. C. de Godoy, “Syndrome of duodenal compression by the superior mesenteric artery following restorative proctocolectomy: a case report and review of literature”, Sao Paulo Med J, vol. 123, no. 3, pp. 151–153, May 2005.