Participation rates in the selection of population controls in a case-control study of colorectal cancer using two recruitment methods Gemma Castaño-Vinyals, Mark J. Nieuwenhuijsen, Víctor Moreno, Estela Carrasco, Elisabet Guinó, Manolis Kogevinas, Cristina M. Villanueva

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

Evaluación : Joint Scientific Meeting of the IEA-EEF and the SEE: Evaluation and selection of abstracts and thematic sessions presented in Toledo