Stavropoulos, V. Kuss, D.J. Griffiths, M.D. Wilson, P. Motti-Stefanidi, F., MMORPG gaming and hostility predict Internet Addiction symptoms in adolescents: An empirical multilevel longitudinal study, Addictive Behaviors, (64), 294-300, 2017, ELSEVIER SCIENCE LTD., 0306-4603