title: Predicting slow recovery from sport-related concussion: the new simple-complex distinction.
authors.forename: Karen M
authors.initials: KM
authors.lastname: Johnston
authors.forename: Paul
authors.initials: P
authors.lastname: McCrory
mesh_terms: D001265:Athletic Injuries; D001924:Brain Concussion / Q000145:classification* / Q000503:physiopathology; D006801:Humans; D008487:Medical History Taking; D011379:Prognosis; D012720:Severity of Illness Index