Matthews, T.J., & MacDorman, M.F. (2007). Infant mortality statistics from the 2004 period linked birth/infant death dataset. In National vital statistics reports (Vol. 55, No. 15). Hyattsville, MD: National Center for Health Statistics.
2.
National Health Interview Survey, 2001-2005. Available from www.cdc.gov/nchs/nhis.htm
3.
National Longitudinal Mortality Study, 1988-1998. Available fromhttp://www.census.gov/nlms/
