Sigurdardottir, Solrun, et al. “Depressive Symptoms and Psychological Distress During the First Five Years After Traumatic Brain Injury: Relationship With Psychosocial Stressors, Fatigue and Pain”. Journal of Rehabilitation Medicine, vol. 45, no. 8, May 2013, pp. 808-14, doi:10.2340/16501977-1156.