SESSAMO, follow-up of secondary students to assess mental health and obesity: a cohort study Adriana Goñi-Sarriés; Guillermo Pírez; Nora Yárnoz-Goñi; Francisca Lahortiga-Ramos; Álvaro Iruin; Azucena Díez-Suárez; Iñaki Zorrilla; Leticia Morata-Sampaio; M. Jesús Oliver; Ana González-Pinto; Almudena Sánchez-Villegas;

Monitoring health and health behaviors among adolescents in Central Catalonia: DESKcohort protocol Judit Rogés; Helena González-Casals; Marina Bosque-Prous; Cinta Folch; Joan Colom; Jordi Casabona; Gemma Drou-Roget; Ester Teixidó-Compañó; Esteve Fernández; Carmen Vives-Cases; Albert Espelt;

Fidelity of implementation of Reptes, an alcohol and cannabis selective prevention program for youngsters Noelia Vázquez; Xavier Continente; Montse Bartroli; Olga Juárez; Laura Muñoz; Francesca Sánchez-Martínez; Anna Pérez; Carles Ariza;