1. Unit for Studies of Integrative Health Care, Division of Nursing, Department of Neurobiology Care Sciences and Society, Karolinska Institute, Stockholm, Sweden.
2. Australian Research Centre in Complementary and Integrative Medicine, Faculty of Health, University of Technology Sydney, Ultimo, Australia.
3. Occupational and Environmental Medicine Unit, Department of Public Health and Community Medicine, University of Gothenburg, Göteborg, Sweden.
4. Quality Stat AB, Umeå, Sweden.