Colonic Polyps

• South Tyneside NHS Foundation Trust — South Shields, Tyne and Wear, United Kingdom
• Bolton NHS Foundation Trust — Bolton, United Kingdom
• Gloucestershire Hospitals NHS Foundation Trust — Cheltenham, United Kingdom
• Dorset Healthcare University NHS Trust — Dorchester, United Kingdom

• Ignasi Puig — Manresa, Barcelona, Spain

• Veterans Affairs Palo Alto — Palo Alto, California, United States
• Veterans Affairs Kansas City — Kansas City, Missouri, United States

• Hotel Dieu Hospital — Kingston, Ontario, Canada

Not specified

Not specified

• University Medical Center Göttingen — Göttingen, Germany
• HELIOS St. Marienberg Hospital Helmstedt — Helmstedt, Germany
• Helios Albert-Schweitzer-Hospital, Academic University Teaching Hospital — Northeim, Germany
• HELIOS Medical Center Siegburg, Department of Gastroenterology — Siegburg, Germany

Not specified

• The First Affiliated Hospital of Xiamen University — Xiamen, Fujian, China

• Medisch Centrum Alkmaar — Alkmaar, Netherlands
• Flevoziekenhuis — Almere Stad, Netherlands
• Amstelland Ziekenhuis — Amstelveen, Netherlands
• Antonie van Leeuwenhoek Ziekenhuis — Amsterdam, Netherlands