Gallstones

• Hospital Clínico Universitario de Santiago — Santiago de Compostela, A coruña, Spain
• Hospital General Universitario de Alicante — Alicante, Spain
• Hospital General Universitario de Elche — Elche, Alicante, Spain
• Hospital Univerisitario Vall D´Hebron — Barcelona, Spain

• IRCCS Azienda Ospedaliero-Universitaria di Bologna — Bologna, BO, Italy

• Sancaktepe Şehit Prof. Dr. İlhan Varank Training and Research Hospital — Istanbul, Turkey (Türkiye)

• Heelkunde — Nieuwegein, Utrecht, Netherlands

• Jorvi, Helsinki University Hospital — Espoo, Finland
• HUS Hyvinkää Hospital — Hyvinkää, Finland

• University of Amsterdam — Amsterdam, North Holland, Netherlands

Not specified

• Institute of Liver & Biliary Sciences — New Delhi, National Capital Territory of Delhi, India

• Lingfu Zhang — Beijing, None Selected, China

Not specified