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September 2007: National Institutes of Health selects Polk County and the University of Iowa for National Children’s Study.
February 2010: Polk County Iowa Study location is selected as one of the pilot locations for the Enhanced Household Recruitment strategy.
March 2010: Community engagement activities begin in Polk County.
August 2010: Study enrollment areas selected in Polk County.
October 2010: Polk County Iowa Study location kick-off event held.
November 2010: Field staff training held.
December 2010: The enumeration process in Study segments begins.