1. Department of Surgical and Perioperative Sciences, Surgery, Umeå University Hospital, Umeå, Sweden;
2. Department of Radiation Science, Division of Oncology, Umeå University, Umeå, Sweden;
3. Division of Family Medicine and Primary Care, Karolinska Institutet, Huddinge, Sweden;
4. Stress Research Institute, Stockholm University, Stockholm, Sweden;
5. Department of Psychology, Macquarie University, North Ryde, NSW, Australia;
6. Department of Medical Science, Uppsala University, Uppsala, Sweden;
7. Department of Medicin Solna, Karolinska Institutet, Stockholm, Sweden;
8. Faculty of Health and Medicine, University of Newcastle, Newcastle, Australia