TY - RPRT A1 - U.S. Department of Health and Human Services T1 - National Vital Statistics Reports. Vol. 49(6): 1-8 Y1 - 2001 UR - http://www.cdc.gov/nchs/data/nvsr/nvsr49/nvsr49_06.pdf PB - Centers for Disease Control and Prevention, U.S. Department of Health and Human Services CY - Atlanta ER -