1. Ghent University, Gent, Belgium
2. Vrije Universiteit Brussel, Brussel, Belgium
3. AZ Maria Middelares Hospital Gent, Gent, Belgium
4. Royal College of Surgeons in Ireland, Dublin, Ireland
5. Imperial College London, London, UK
6. Jagiellonian University Medical College, Krakow, Poland
7. University of Münster, Münster, Germany