1. Departments of Surgery Franciscus Gasthuis & Vlietland Rotterdam the Netherlands
2. Clinical Chemistry Franciscus Gasthuis & Vlietland Rotterdam the Netherlands
3. Statistics and Education Franciscus Gasthuis & Vlietland Rotterdam the Netherlands
4. Department of Obstetrics and Gynaecology University Medical Centre Utrecht Utrecht the Netherlands
5. Department of Surgery Erasmus MC, University Medical Centre Rotterdam the Netherlands
6. Department of Surgery Tawam Hospital Al Ain United Arab Emirates
7. Internal Medicine Franciscus Gasthuis & Vlietland Rotterdam the Netherlands