title: Discordant identical twins. V. Neural tube defects.
mesh_terms: D000328:Adult; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008588:Meningocele / Q000209:etiology*; D016135:Spinal Dysraphism / Q000209:etiology*; D013168:Spondylolisthesis / Q000209:etiology*