1. Bispebjerg Hospital; Department of Surgical Gastroenterology K; Bispebjerg Bakke 23 Copenhagen NV Denmark DK-2400
2. H:S Bispebjerg Hospital; Surgical gastroenterology dept. K; 23 Bispebjeg Bakke Copenhagen Denmark DK 2400
3. Hillerød University Hospital; Department of Obstetrics and Gynecology; Hillerød Denmark 3400
4. Naestved University Hospital; Department of Obstetrics and Gynecology; Naestved Denmark