Phase II pilot trial (Yale University; PI: Ilan Harpaz-Rotem PhD; NCT02727998). Status: TERMINATED. Participants: n=28 enrolled; adults with PTSD. Intervention: intensive 7-day treatment combining a single IV ketamine infusion with prolonged exposure therapy. Start: December 2015; end: November 2021. CT.gov: 0 refs listed. Linked paper: Duek O, Korem N, Li Y, Kelmendi B (Yale/VA Connecticut) — Neuropsychopharmacology 2023 (PMID 37270621): neural imaging analysis showing long-term structural and functional changes following a single ketamine infusion in participants with PTSD.