title: HLA homozygosity and neural-tube defects.
mesh_terms: D000483:Alleles; D000818:Animals; D006680:HLA Antigens / Q000235:genetics*; D006720:Homozygote; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000235:genetics*
chemical_list: D006680:HLA Antigens