title: Problems in the definition of holoprosencephaly.
authors.forename: M M
authors.initials: MM
authors.lastname: Cohen
mesh_terms: D002490:Central Nervous System / Q000002:abnormalities; D005314:Embryonic and Fetal Development; D016142:Holoprosencephaly / Q000145:classification / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D007231:Infant, Newborn; D010641:Phenotype; D009626:Terminology as Topic