title: A teenager with confusion.
authors.affiliation: Department of Pediatrics, Division of Emergency Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA. oconnell@email.chop.edu
authors.forename: Karen
authors.initials: K
authors.lastname: O'Connell
mesh_terms: D000208:Acute Disease; D002648:Child; D003221:Confusion / Q000175:diagnosis* / Q000209:etiology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008881:Migraine Disorders / Q000150:complications* / Q000175:diagnosis* / Q000628:therapy; D010808:Physical Examination