title: Variability in genetic syndromes: Some lessons from history.
authors.forename: Annapia
authors.initials: A
authors.lastname: Verri
authors.forename: Chris
authors.initials: C
authors.lastname: Oliver
mesh_terms: D003635:De Lange Syndrome / Q000235:genetics*; D014644:Genetic Variation; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D025064:Sex Chromosome Disorders / Q000235:genetics*