title: Author Response.
authors.forename: Robert A
authors.initials: RA
authors.lastname: Stern
authors.forename: Julie M
authors.initials: JM
authors.lastname: Stamm
mesh_terms: D001924:Brain Concussion / Q000175:diagnosis* / Q000453:epidemiology*; D003072:Cognition Disorders / Q000175:diagnosis* / Q000453:epidemiology*; D005538:Football / Q000293:injuries*; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests