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Journal of Clinical Epidemiology > 2007 > 60 > 7 > 686-695
The Journal of Allergy and Clinical Immunology > 2005 > 115 > 4 > 714-719
Journal of Clinical Epidemiology > 2007 > 60 > 7 > 686-695
The Journal of Allergy and Clinical Immunology > 2005 > 115 > 4 > 714-719