The alpha-2A-adrenoceptor agonist, guanfacine, increases regional cerebral blood flow in dorsolateral prefrontal cortex of monkeys performing a spatial working memory task. - Avery RA; Franowicz JS; Studholme C; van Dyck CH; Arnsten AF (Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2000)