1 Department of Surgical and Perioperative Sciences, Umeå University, Sweden Department of Surgical and Perioperative Sciences, Umeå University, Sweden Department of Surgical and Perioperative Sciences, Umeå University, Sweden Department of Surgical and Perioperative Sciences, Umeå University, Sweden Department of Imaging and Physiology, Karolinska University Hospital, Stockholm, Sweden Department of Surgical and Perioperative Sciences, Umeå University, Sweden Department of Surgical and Perioperative Sciences, Umeå University, Sweden.