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