“…Frequent bullying in adolescence is well known to predict mental health problems (Bond et al, 2001;Due et al, 2005;Ford, King, Priest, & Kavanagh, 2017;Hodges, Boivin, Vitaro, & Bukowski, 1999;Klomek, Marrocco, Kleinman, Schonfeld, & Gould, 2007;Lien, Green, Welander-Vatn, & Bjertness, 2009;Thomas et al, 2017;Ttofi, Farrington, Lӧsel, & Loeber, 2011;Undheim & Sund, 2010). Due et al (2005) explored this relationship in a cross-national study across 28 countries.…”