1. Department of Vascular Surgery, Sint-Andries Ziekenhuis, Tielt, Belgium
2. Department of Public Health, Biostatistics unit, University of Ghent, Ghent, Belgium
3. Department of Vascular Surgery, University Hospitals Leuven, Belgium
4. Department of Cardiovascular and Thoracic Surgery, University Hospital Mont-Godinne, Mont-Godinne, Belgium
5. Department of Internal Medicine, Sint-Andriesziekenhuis, Tielt, Belgium
6. Department of Vascular Surgery, UZ Brussels, Brussels, Belgium