Khakpoor, Sahel, et al. “Reductions in Transdiagnostic Factors As the Potential Mechanisms of Change in Treatment Outcomes in the Unified Protocol: A Randomized Clinical Trial”. Research in Psychotherapy: Psychopathology, Process and Outcome, vol. 22, no. 3, Dec. 2019, doi:10.4081/ripppo.2019.379.