1. a Dept. Neurobiology , Care Sciences and Society, Division of Physiotherapy , Alfred Nobels Allé 23, 141 83, Huddinge, Sweden
2. b Dept. Public Health Sciences , Div. International Health (IHCAR) Karolinska Institutet , Nobels väg 9, 17177, Stockholm, Sweden
3. c Dept. Public Health and Caring Sciences , Family Medicine and Clinical Epidemiology, Uppsala University , Uppsala, Sweden
4. d Dept. Neurobiology , Care Sciences and Society, Division of Nursing , Alfred Nobels Allé 23, 141 83, Huddinge, Sweden
5. e School of Health and Medical Sciences, Örebro University , SE - 701 82, Örebro, Sweden