Digestive System Fistula

• Hamilton Health Sciences — Hamilton, Ontario, Canada
• Kingston General Hospital — Kingston, Ontario, Canada
• London Health Sciences Centre — London, Ontario, Canada
• The Ottawa Hospital — Ottawa, Ontario, Canada

• Fondazione IRCCS Istituto Nazionale dei Tumori, Milano — Milan, Italy

• London North West University Healthcare NHS Trust — Harrow, London, United Kingdom

• Mansoura university hospital — Al Mansurah, Dakahlia Governorate, Egypt

Not specified

• Akademiska Sjukhuset (Uppsala University hospital) — Uppsala, Sweden

Not specified

• University Clinic Hospital Lozano Blesa — Zaragoza, Spain

• Health science University - Kayseri State Hospital — Kocasinan, Kayseri, Turkey (Türkiye)

Not specified