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References

Wednesday, 22 October 2008 15:46
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  1.  Centers for Disease Control and Prevention. Surveillance for Asthma -- US, 1960-1995. (CDC Surveillance Summaries.) MMWR. 1998;47:1022-1025

  2. National Center for Health Statistics (NCHS), National Health Interview Survey. 1982-1994.
    Available at http://www.cdc.gov/nchs/nhis.htm



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