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2. Birth rates for US teenagers reach historic lows for all age and ethnic groups;Hamilton;NCHS Data Brief,2012
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4. Adolescent childbearing: consequences and interventions;Ruedinger;Curr Opin Pediatr,2012
5. Centers for Disease Control and Prevention. Teen pregnancy prevention 2010-2015: integrating services, programs, and strategies through communitywide initiatives: the President’s teen pregnancy prevention initiative. Available at: www.cdc.gov/teenpregnancy/PreventTeenPreg.htm. Accessed March 24, 2014.