Kozarek RA, Raltz S, Marcon N, Kortan P, Haber G, Lightdale C, Stevens P, Lehman G, Rex D, Benjamin S, Fleischer D, Bashir R, Fry S, Waxman I, Benson J, Polio J. Use of the 25 mm flanged esophageal Z stent for malignant dysphagia: a prospective multicenter trial. Gastrointest Endosc. 1997 Aug; 46(2):156-60.