?:authorAffiliation
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[\'Clinical Effectiveness Research group, Institute for Health and Society, University of Oslo and Oslo University Hospital, PO Box 1089, Blindern, 0318, Oslo, Norway. lisemhe@medisin.uio.no.\', \'Clinical Effectiveness Research group, Institute for Health and Society, University of Oslo and Oslo University Hospital, PO Box 1089, Blindern, 0318, Oslo, Norway.\', \'Department of General Practice, Institute of Health and Society, University of Oslo, Oslo, Norway.\', \'Vårdcentralen Årjäng and Centre for Clinical Research, County Council of Värmland, Värmland, Sweden.\', \'Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.\']
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