?:authorAffiliation
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[\'Department of Community Health Sciences, Cumming School of Medicine and O\'Brien Institute for Public Health, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada.\', \'Department of Economics, University of Calgary, 527 Campus Place NW, Calgary, AB T2N 4Z6, Canada. Electronic address: ahollis@ucalgary.ca.\']
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