1. Is myelomeningocele a disappearing disease?;Stein;Pediatrics,1982
2. Prenatal diagnosis of open neural tube defects using the amniotic fluid acetylcholinesterase assay;Milunsky;Obstet Gynecol,1982
3. Maternal serum alpha-fetoprotein measurement in antenatal screening for anencephaly and spina bifida in early pregnancy;United Kingdom Collaborative Study on Alpha-fetoprotein in Relation to Neural Tube Defects;Lancet,1977
4. Maternal serum α-fetoprotein screening in North Carolina: experience with more than twelve thousand pregnancies;Burton;Am J Obstet Gynecol,1983
5. Prenatal serum α-fetoprotein screening for neural tube defects;Macri;Obstet Gynecol,1982