Barriers of mental health treatment utilization among first-year college students : first cross-national results from the WHO World Mental Health International College Student Initiative - Ebert, David Daniel (Friedrich-Alexander-University Erlangen-Nürnberg) ; Mortier, Philippe (Universitair Psychiatrisch Centrum-Katholieke Universiteit Leuven) ; Kaehlke, Fanny (Friedrich-Alexander-University Erlangen-Nürnberg) ; Bruffaerts, Ronny (Universitair Psychiatrisch Centrum-Katholieke Universiteit Leuven) ; Baumeister, Harald (University of Ulm) ; Auerbach, Randy P. (Columbia University) ; Alonso, Jordi (Institut Hospital del Mar d'Investigacions Mèdiques) ; Vilagut, Gemma (Institut Hospital del Mar d'Investigacions Mèdiques) ; Martínez, Kalina U. (Universidad Autónoma de Aguascalientes (Mèxic)) ; Lochner, Christine (University of Stellenbosch) ; Cuijpers, Pim (Amsterdam Public Health Research Institute) ; Kuechler, Ann-Marie (University of Ulm) ; Green, Jennifer (Boston University) ; Hasking, Penelope (Curtin University) ; Lapsley, Coral (Ulster University, Derry-Londonderry) ; Sampson, Nancy A. (Harvard Medical School) ; Kessler, Ronald (Harvard Medical School) ; Universitat Autònoma de Barcelona