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European Journal of Epidemiology > 2007 > 22 > 10 > 699-705
Journal of Psychiatric Research > 1999 > 33 > 5 > 407-418
European Journal of Epidemiology > 2007 > 22 > 10 > 699-705
Journal of Psychiatric Research > 1999 > 33 > 5 > 407-418