Pain, Postoperative

• Department of Anaesthesiology Sestre Milosrdnice, University Hospital Center — Zagreb, Vinogradska 29, Croatia
• NHS Grampian — Aberdeen, United Kingdom
• University College London Hospitals NHS Foundation Trust — London, United Kingdom
• Kings Mill Hospital, Sherwood Forest Hospitals NHS Foundation Trust — Nottingham, United Kingdom

• Prince of Wales Hospital — Hong Kong

• Prof. Dr. Margono Soekarjo Hospital — Purwokerto, Central Java, Indonesia

• St. Joseph's Healthcare Hamilton - Charlton Campus — Hamilton, Ontario, Canada

• 4th Military Clinical Hospital with Polyclinic — Wroclaw, Lower Silesian Voivodeship, Poland

• Orthopaedic Institute for Children — Los Angeles, California, United States
• Ronald Reagan UCLA Medical Center — Los Angeles, California, United States
• UCLA Medical Center, Santa Monica — Santa Monica, California, United States
• Ann & Robert H. Lurie Children's Hospital of Chicago — Chicago, Illinois, United States

• Loyola University Medical Center — Maywood, Illinois, United States

• The University of Texas Health Science Center, Houston — Houston, Texas, United States

• Hospital de Base do Distrito Federal (Instituto de Gestão Estratégica de Saúde do Distrito Federal - IGESDF) — Brasília, Federal District, Brazil

Not specified