?:authorAffiliation
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[\'Clinical Effectiveness Research Group, Oslo University Hospital and University of Oslo, Norway.\', \'Faculty of Health Sciences, The Arctic University of Norway, Norway.\', \'Department of General Practice, University of Oslo, Norway.\', \'Vårdcentralen Årjäng & Centre for Clinical Research, Sweden.\', \'Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Sweden.\']
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