Acute Calculous Cholecystitis

• Aichi Medical University — Aichi, Japan
• Gifu Municipal Hospital — Gifu, Japan
• Gifu Prefectural General Medical Center — Gifu, Japan
• Gifu University Hospital — Gifu, Japan

• Aswan University — Aswān, Egypt

• Ain Shams University Hospitals - AUSH — Cairo, Egypt

Not specified

• Assiut University — Asyut, Egypt

Not specified

• Digestive disease center, Department of Internal Medicine, Cheju Halla General Hospital — Jeju City, Jeju Special Self-governing Province, South Korea