AbstractReferences1. Martin J Hamilton B Sutton P . Births: final data for 2002. Natl Vital Stat Rep 2002 Dec 17;52:1–114. Also available from: URL: http://www.cdc.gov/nchs/data/nvsr/nvsr52/nvsr52_10.pdf2.National Center for Health Statistics (US). Early release of selected estimates from the January–June 2003 National Health Interview Survey (2003 Dec 17) [cited 2004 Feb 18]. Available from: URL: http://www.cdc.gov/nchs/nhis.htm
