Emotion regulation and heart rate variability may identify the optimal posttraumatic stress disorder treatment: analyses from a randomized controlled trial.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. Department of Veterans Affairs RR&D Merit Review (1 I01 RX001485-01; PJB) and Department of Veterans Affairs Advanced Fellowships in the War Related Illness and Injury Study Center (DCM, RJS-H, TJA). Funding bodies have not and will not participate in the study design, the collection, management, analysis, or interpretation of data, nor the writing of findings for publication. The contents of this manuscript do not represent the views of the US Department of Veterans Affairs or the United States Government."

"Clinical trial registration ClinicalTrials.gov identifier, NCT02366403"