title: Commentary.
authors.affiliation: Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA. bennettmi@email.chop.edu
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Bennett
mesh_terms: D003937:Diagnosis, Differential; D006712:Homocystinuria / Q000175:diagnosis*; D006801:Humans; D008382:Marfan Syndrome / Q000175:diagnosis*