VenturaSJAbmaJCMosherWDHenshawSK. Estimated pregnancy rates for the United States, 1990–2005: An update. Natl Vital Stat Rep2009 Oct 14;58:1–15. Also available from: URL: http://www.cdc.gov/nchs/data/nvsr/nvsr58/nvsr58_04.pdf [cited 2009 Nov 3].
2.
CohenRAMartinezME. Health insurance coverage: Early release of estimates from the National Health Interview Survey, January– March 2009. Hyattsville (MD): National Center for Health Statistics; 2009. Also available from: URL: http://www.cdc.gov/nchs/data/nhis/earlyrelease/insur200909.htm [cited 2009 Nov 3].
3.
MacDormanMFMathewsTJ. Behind international rankings of infant mortality: How the United States compares with Europe. NCHS Data Brief2009;23:1–8.
4.
National Center for Health Statistics. Health, United States, 2008. Hyattsville (MD): NCHS; 2009.
National Center for Health Statistics. Linked birth and infant death data set [cited 2009 Nov 3]. Available from: URL: http://www.cdc.gov/nchs/linked.htm