Surgical Procedure, Unspecified

• 2nd Department of General Surgery, Jagiellonian University Medical College — Krakow, Małopolska, Poland

• University Hospital of Split — Split, Croatia

• Nagasaki University Hospital — Nagasaki, Japan

• American University of Beirut Medical Center — Beirut, Lebanon

• Florida Hospital Orlando — Orlando, Florida, United States

• School of Dentistry - University of Bologna — Bologna, Italy

• Military Hospital — Toulon, France

• Universidad de Extremadura- Facultad de Medicina — Badajoz, Spain

Not specified

• Nationwide Children's Hospital — Columbus, Ohio, United States