1. Economic costs of birth defects and cerebral palsy-United States, 1992;Centers for Disease Control and Prevention (CDC);MMWR Morb Mortal Wkly Rep,1995
2. Impact of the detection and prevention of developmental abnormalities in human studies;Holmes;Reprod Toxicol,1997
3. The impact of congenital malformation on public health;Sever;Int J Abnormal Development,1997
4. Statistics Canada. Selected Infant Mortality Statistics, Canada 1921–1990. 1993 Catalogue No. 82-549