Association between cumulating substances use and cumulating several school, violence and mental health difficulties in early adolescents. Chau, Kénora; Mayet, Aurélie; Legleye, Stéphane; Beck, François; Hassler, Christine; Khlat, Myriam; Choquet, Marie; Falissard, Bruno; Chau, Nearkasen. Psychiatry Research. 2019; 280: p.112480. doi:10.1016/j.psychres.2019.112480Article