Digestive System Diseases

• Center of Oncology of the Lublin Region — Lublin, Województwo, Poland
• Provincial Specialist Hospital in Lublin — Lublin, Poland

• Kyung Hee University Hospital at Gangdong — Seoul, Gangdong-gu, South Korea

• Esraa — Asyut, Egypt

• Provincial Hospital in Gorzow Wielkopolski — Gorzów Wielkopolski, Poland
• Fifth Military Hospital — Krakow, Poland
• First Military Hospital — Lublin, Poland
• II Department of Anesthesia and Intensive Care, Medical University of Lublin — Lublin, Poland

Not specified

• London Health Sciences Centre — London, Ontario, Canada

• Children's Hospital Colorado — Aurora, Colorado, United States
• Boston Children's Hospital — Boston, Massachusetts, United States

• Mayo Clinic — Rochester, Minnesota, United States

• Hospital Universitario San Juan de Alicante — Alicante, Spain
• Hospital Universitario Fundación Jiménez Díaz — Madrid, Spain
• HU Clinica Asturias — Oviedo, Spain
• Hospital Universitario Son Espases — Palma de Mallorca, Spain

• AUD — New Orleans, Louisiana, United States