Circulating PACAP levels are associated with increased amygdala-default mode network resting-state connectivity in posttraumatic stress disorder. - Clancy KJ; Devignes Q; Kumar P; May V; Hammack SE; Akman E; Casteen EJ; Pernia CD; Jobson SA; Lewis MW; Daskalakis NP; Carlezon WA Jr; et al. (Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2023)