title: Comment on changes in sex ratio in neural tube defects since food fortification with folic acid: re "hypothesis: the female excess in cranial neural tube defects reflects an epigenetic drag of the inactivating X chromosome on the molecular mechanisms of neural tube fold elevation".
authors.forename: Jane A
authors.initials: JA
authors.lastname: Evans
mesh_terms: D000818:Animals; D044127:Epigenesis, Genetic / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009432:Neural Crest / Q000196:embryology*; D009436:Neural Tube Defects / Q000453:epidemiology* / Q000235:genetics*; D049951:X Chromosome Inactivation / Q000502:physiology*