University of Oslo, Oslo, Norway
University of Oslo, Oslo, Norway
University of Oslo, Oslo, Norway
University of Oslo, Oslo, Norway
University of Oslo, Oslo, Norway
University of Oslo, Oslo, Norway
University of Oslo, Institute for Health and Society, Department of General Practice, Oslo, Norway
Department of General Practice, Institute og Health and Society, University og Oslo, Oslo, Norway
Erik Mauland, Oslo, Norway
University of Oslo, Oslo, Norway