[1] University of Gothenburg,The Sahlgrenska Academy, Institute of Health and Care Sciences
[2] Hallands Hospital Varberg,Department of Medicine
[3] University of Gothenburg,Primary Health Care Unit, Department of Public Health and Community Medicine, Institute of Medicine, The Sahlgrenska Academy
[4] Spenshult Research and Development Centre,Department of Surgery
[5] Angered Local Hospital,undefined
[6] Hallands Hospital Halmstad,undefined