Title: Comorbidity of Psychiatric disorders with Internet addiction in a clinical sample: the effect of personality, defense style and psychopathology Authors: Georgios Floros 1,2 , Konstantinos Siomos 2 , Ariadni Stogiannidou 3 , Ioannis Giouzepas 1 , Georgios Garyfallos 1 1. 2nd Department of Psychiatry, School of Medicine, Aristotle University of Thessaloniki, Greece 2. Hellenic Association for the Study of Internet Addiction Disorder, Larissa, Greece 3. Department of Psychology, School of Philosophy, Aristotle University of Thessaloniki, Greece Corresponding author Georgios D. Floros 2 nd Department of Psychiatry Aristotle University of Thessaloniki 196 Langada str., 564 29 Thessaloniki Fax (+30)2312203122 Tel (+30)6944324565 E-mail: georgefloros@gmail.com THIS IS A NON-FINAL VERSION OF AN ARTICLE PUBLISHED IN FINAL FORM IN 'ADDICTIVE BEHAVIORS '. THE FINAL VERSION IS AVAILABLE IN THE JOURNAL'S HOMEPAGE AT http://www.sciencedirect.com/science/article/pii/S0306460314002627