1. Neural tube defects: issues in prenatal diagnosis and counseling;Main;Obstet Gynecol,1986
2. US evaluation of the normal and abnormal fetal neural axis;Fiske;Radiol Clin North Am,1982
3. Ultrasonography of the normal and pathological fetal skeleton;Filly;Radiol Clin North Am,1982
4. Sonographic detection of intrauterine fetal neural tube defects;Larson;Appl Radiol,1992
5. The role of US in evaluation of patients with elevated MSAFP: a review;Watson;Obstet Gynecol,1991