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European Journal of Epidemiology > 2013 > 28 > 6 > 513-523
Journal of Behavioral Medicine > 2013 > 36 > 2 > 199-211
European Journal of Epidemiology > 2013 > 28 > 6 > 513-523
Journal of Behavioral Medicine > 2013 > 36 > 2 > 199-211