1. Institute of Medicine/Dept. of Public Health and Community/Primary Health Care, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
2. Närhälsan R&D Centre, Skaraborg Primary Care, Skövde, Sweden;
3. Närhälsan Mölnlycke Primary Health Care and Research Centre, Gothenburg, Sweden;
4. Department of Internal Medicine, Skaraborg Hospital, Skövde, Sweden