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Maternal mortality per 100,000 live births, USA, 1900–1997.
Source: Centers for Disease Control and Prevention. Achievements in public health, 1900–1999: healthier mothers and babies. MMWR Morb Mortal Wkly Rep 1999;48:849–88. Available at: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm4838a2.htm [Accessed 11 August 2012].
