The article you requested is

Quetiapine Treatment for Mania Secondary to Brain Injury in 2 Patients

J Clin Psychiatry 2008;69(3):497-498 [letter]

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Sir: In the only 2 studies that estimate prevalence of mania secondary to traumatic brain injury (TBI), Jorge et al.1 diagnosed mania in 9% of 66 consecutive brain-injured patients and Van Reekum et al.2 found 22% of 18 TBI patients developed a bipolar spectrum disorder after mild or moderate TBI. Both of these estimates are higher than the known lifetime prevalence of bipolar I disorder, which is 0.4% to 1.6%.3​