A pilot study of an online group-based Internal Family Systems intervention for comorbid posttraumatic stress disorder and substance use - Ally, Dilara; Tobiasz-Veltz, Laure; Tu, Kevin; Comeau, Alexandra; Bumpus, Clare; Blot, Tori; Rice, Fiona Kate; Orr, Brian; Soumerai Rea, Hanna; Sweezy, Martha; Schuman-Olivier, Zev (Frontiers in Psychiatry, 2025)