1. Department of Surgical Sciences Section of Vascular Surgery Uppsala University Uppsala Sweden
2. Department of Surgical and Perioperative Sciences Surgery Umeå University Umeå Sweden
3. Department of Statistics Umeå School of Business, Economics and Statistics Umeå University Umeå Sweden
4. Department of Surgery Faculty of Medicine and Health Örebro University Örebro Sweden
5. Wallenberg Centre for Molecular Medicine Umeå University Umeå Sweden