Acute Pain

• Hospital Universitario Puerta de Hierro — Majadahonda, Madrid, Spain
• Hospital Universitario San Juan de Alicante — Alicante, Spain
• Hospital General Universitario de Burgos y Clínica Colina — Burgos, Spain
• Fundación para la Investigación Biomédica Hospital La Princesa — Madrid, Spain

• Radboudumc — Nijmegen, Netherlands

• Duke University Medical Center — Durham, North Carolina, United States
• KK Women's and Children's Hospital — Singapore

• Ankara University — Ankara, Turkey (Türkiye)

Not specified

• Copenhagen University Hospital - Hvidovre — Hvidovre, Denmark

• Makassed General Hospital — Beirut, Lebanon

• Beijing Tiantan Hospital — Beijing, Beijing Municipality, China

• Banner University Medical Center Tucson — Tucson, Arizona, United States

• Prince of Wales Hospital — Hong Kong