Karekla, Maria, Pinelopi Konstantinou, Myria Ioannou, Ioannis Kareklas, and Andrew T. Gloster. “The Phenomenon of Treatment Dropout, Reasons and Moderators in Acceptance and Commitment Therapy and Other Active Treatments: A Meta-Analytic Review”. Clinical Psychology in Europe 1, no. 3 (September 20, 2019): 1-36. Accessed August 3, 2020. https://cpe.psychopen.eu/index.php/cpe/article/view/2545.