Hernia, Abdominal

• Gasthuisberg University Hospitals KUL — Leuven, Belgium
• Copenhagen university hospital, Gentofte — Hellerup, Denmark
• Hôpital Jean Verdier — Bondy, France
• St. Hildegardis-Krankenhaus — Mainz, Germany

• Ambulatory Surgical Clinic, Hørshom Sygehus — Hørsholm, Denmark
• Marienhospital, Viszeralchirurgie — Stuttgart, Germany

• Dep. of Visceral and Transplantsurgery, Bern University Hospital — Bern, Switzerland

• North Karelia Central Hospital - Clinic of Surgery — Joensuu, Pohjois-Karjala, Finland

• Hospital for Children and Adolescents — Helsinki, Finland

• Frolunda Specialist Hoospital/University of Gothenburg, Lundby Hospital, Molndals Hospital/Sahlgrens University Hospital — Gothenburg, Vastra Gotalandsregionen, Sweden

• Centre for Clinical Research, Central hospital, entrance 29 — Västerås, Sweden

• Mansoura University Hospital — Al Mansurah, Dakahlia Governorate, Egypt
• Al Mansurah, Egypt

Not specified

• Prisma Health — Greenville, South Carolina, United States