1. Temporal trends in the prevalence of congenital malformations at birth based on the birth defects monitoring program, United States, 1979–1987;Edmonds;MMWR Morb Mortal Wkly Rep,1990
2. Prevalence of spina bifida at birth—United States, 1983–1990: A comparison of two surveillance systems;Lary;MMWR Morb Mortal Wkly Rep,1996
3. Epidemiologic characteristics of phenotypically distinct neural tube defects among 0.7 million California births, 1983–1987;Shaw;Teratology,1994
4. Impact of prenatal diagnosis on the birth prevalence of neural tube defects, Atlanta, 1990–1991;Roberts;Pediatrics,1995
5. Impact of prenatal diagnosis and elective termination on prevalence and risk estimates of neural tube defects in California, 1989–1991;Velie;Am J Epidemiol,1996