?:authorAffiliation
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[\'Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.\', \'Department of Paediatrics, Orebro University Hospital, Orebro, Sweden.\', \'Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Nottingham, UK.\', \'Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA.\']
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