1. Department of Medicine and Department of Clinical Sciences; Karolinska Institutet; Clinical Research Center Norra Building 8 Stockholm Sweden SE 182 88
2. Department of Physiotherapy and Unit of Clinical Research Utilization; Karolinska University Hospital; Stockholm Sweden
3. Department of Clinical Sciences; Karolinska Institutet; Stockholm Sweden SE 182 88
4. Department of Nephrology; Danderyd Hospital; Stockholm Sweden