Cholecystitis, Acute

• University of Colorado Denver — Aurora, Colorado, United States
• Emory University School of Medicine — Atlanta, Georgia, United States
• Parkview Medical Center — Fort Wayne, Indiana, United States
• Mayo Clinic — Rochester, Minnesota, United States

• Aleppo University Hospital — Aleppo, Syria

• Chirurgia 1, Fondazione IRCCS Policlinico San Matteo — Pavia, Italy
• Department of General and Digestive Surgery Hospital Universitario La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP) Universidad Autónoma de Madrid (UAM), — Madrid, Spain

• Yonsei University Health System, Severance Hospital — Seoul, South Korea

Not specified

• Istanbul Medipol University Hospital — Istanbul, Bagcilar, Turkey (Türkiye)

• University of Health Sciences Izmir Tepecik Training and Research Hospital — Izmir, Konak, Turkey (Türkiye)

Not specified

• Ain Shams University Hospitals - AUSH — Cairo, Egypt

Not specified