Problematic Video Game Use: Estimated Prevalence and Associations with Mental and Physical Health. - Rune Aune Mentzoni; Geir Scott Brunborg; Helge Molde; Helga Myrseth; Knut Joachim Mår Skouverøe; Jørn Hetland; Ståle Pallesen (Cyberpsychology Behav. Soc. Netw., 2011)