Inpatient dialectical behavior therapy combined with trauma-focused therapy for PTSD and borderline personality disorder symptoms: study design of the naturalistic trauma therapy study - Kamstra, Annemieke C.; de Vries, Sybolt O.; Brilman, Maarten F.; Vasilev, Petty; Alma, Manna A.; van Asselt, Antoinette D. I.; De Wolf, Mia; Schoevers, Robert A.; Jörg, Frederike (Frontiers in Psychiatry, 2025)