1. Department of Social Medicine, Karolinska Institute, Huddinge University Hospital, Huddinge, Correspondence address: Professor Erik AUander, MD, PhD Department of Social Medicine, M 96, WHO Collaborating Centre for the Epidemiology of Rheumatic Conditions, Karolinska Institute, Huddinge University Hospital, SE-141 86 Huddinge, Sweden
2. Department of Philosophy, Stockholm University, Stockholm, Sweden