McAllister TW, Flashman LA, McDonald BC, Ferrell RB, Tosteson TD, Yanofsky NN, Grove MR, Saykin AJ. Dopaminergic challenge with bromocriptine one month after mild traumatic brain injury: altered working memory and BOLD response. J Neuropsychiatry Clin Neurosci. 2011; 23(3):277-86.