[1] Reg Referal Ctr Esophageal Pathol, Dept Gen Surg 4, Pisa, Italy
[2] Univ Milan, IRCCS, Ist Clin Humanitas, Gastroenterol Unit, Milan, Italy
[3] Univ Milan, Dept Surg, Milan, Italy
[4] Med Coll Wisconsin, Div Gastroenterol & Hepatol, Dept Med, Milwaukee, WI 53226 USA
[5] Univ Washington, VA Puget Sound Hlth Care Syst, Seattle, WA 98195 USA
[6] Univ Clin Hosp Jose Joaquin Aguirre, Dept Surg, Santiago, Chile
[7] Washington Univ, Sch Med, Div Gastroenterol, St Louis, MO 63110 USA
[8] Texas Tech Univ, Hlth Sci Ctr, Dept Internal Med, El Paso, TX USA
[9] Texas Tech Univ, Dept Internal Med, Paul L Foster Sch Med, El Paso, TX USA
[10] Univ Milan, Sch Med, IRCCS Policlin San Donato, Dept Surg, Milan, Italy
[11] Univ Washington, Sch Med, Dept Surg, Hlth Sci Ctr, Seattle, WA 98195 USA
[12] Boston Univ, Coll Med, Gastroenterol Sect, Boston, MA 02215 USA
[13] Univ Alabama Birmingham, Dept Radiol, Birmingham, AL USA
[14] Univ Favaloro, Clin San Camilo, Buenos Aires, DF, Argentina
[15] Univ Naples 2, Ctr Esophagogastr & Obes Surg, Naples, Italy