1. Department of Surgical and Perioperative Sciences, Surgery Umeå University Umeå Sweden
2. Department of Statistics Umeå School of Business and Economics Umeå University Umeå Sweden
3. Leeds Institute of Medical Research at St James's University of Leeds Leeds UK
4. Department of Surgery Faculty of Medicine and Health Örebro University Örebro Sweden
5. Wallenberg Centre for Molecular Medicine Umeå University Umeå Sweden