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Figure 1: Rate of SIDS (orange bars), expressed as the number of SIDS cases per 1,000 live births, and the percent of infants put to sleep in the supine position (blue line with squares) in the United States over the period from 1979 to 2010. Data on SIDS rate (1979–2009) from the Centers for Disease Control and Prevention (CDC), as provided on the CDC Wide-ranging Online Data for Epidemiologic Research (WONDER) website (http://wonder.cdc.gov/mortSQL.html). For the years 1979–1999, the data refer to all deaths labeled with code 798.0 (“sudden infant death syndrome”) of the Ninth Revision of the International Classification of Diseases (ICD-9) of the World Health Organization. For the years 2000–2009, the data refer to all deaths specified with code R95 (“sudden infant death syndrome”) of the Tenth Revision (ICD-10). Data on supine sleep position (1992–2010) from the National Infant Sleep Position Study (NISP) of the National Institute of Child Health and Human Development (NICHD), as provided on the NISP public access website hosted by Boston University (http://slone-web2.bu.edu/ChimeNisp/Main_Nisp.asp).