The efficacy of Cognitive-Analytic Therapy (CAT) on anhedonia in patients with Obsessive-Compulsive Personality Disorder by Zagora Christina, Voikli Maki, Protogerou Christina, Katsigiannopoulos Konstantinos, Bozikas Vasilios, Adamopoulou Aravella, Kosti Fotini, Garyfallos George