Cognitive rehabilitation for traumatic brain injury: A randomized trial. Defense and Veterans Head Injury Program (DVHIP) Study Group. - Salazar AM; Warden DL; Schwab K; Spector J; Braverman S; Walter J; Cole R; Rosner MM; Martin EM; Ecklund J; Ellenbogen RG; Defense and Veterans Head Injury Program Study Group; et al. (JAMA: Journal of the American Medical Association, 2000)