Another area that is unfortunately limited is the authors' coverage of more broadly defined flexible CPT, including combining interventions (e.g., SMART-CPT, repeated Transcranial Magnetic Stimulation), changing the density of CPT treatment (e.g., massed CPT), and strategies to dismantle or even restructure CPT (e.g., CPT-modular). Investigation of these more extreme examples of flexibly delivered CPT can explore the boundaries of how far the treatment can be bent before it is broken, improve our understanding of the critical treatment elements, and inform just how flexible CPT can be. Tailoring manualized treatment to the needs of the client: a review of flexible applications of cognitive processing therapy: Evidence-Based Treatment Methods: by Tara Galovski, Reginald Nixon, Debra Kaysen, Academic Press, 2020. [Extracted from the article]