title: Are 'upper' and 'lower' neural tube defects aetiologically different?
mesh_terms: D000757:Anencephaly / Q000235:genetics*; D004198:Disease Susceptibility; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009436:Neural Tube Defects / Q000209:etiology* / Q000235:genetics / Q000473:pathology; D009523:Newfoundland and Labrador; D016136:Spina Bifida Occulta / Q000235:genetics*