AUTHOR=Strunk Daniel R. , Lorenzo-Luaces Lorenzo , Huibers Marcus J. H. , Kazantzis Nikolaos TITLE=Editorial: Contemporary Issues in Defining the Mechanisms of Cognitive Behavior Therapy JOURNAL=Frontiers in Psychiatry VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2021.755136 DOI=10.3389/fpsyt.2021.755136 ISSN=1664-0640