Psychosocial risk for substance use in 80,000 Mexican undergraduates: mental health and academic strain. - Martinez-Gonzalez MF; Alvarez-Lozada LA; Verdines-Pérez AM; Quiroga-Garza A; Jacobo-Baca G; Elizondo-Omaña R; Guzman-Lopez S; Del Río-Muñoz SE; Muñoz-Maldonado GE; Tamez-Gonzalez G; Castillo-Elizondo JA; Salinas-Zertuche A (Frontiers in public health, 2026)