Effectiveness of a school-based intervention on physical activity for high school students in Brazil: the Saude na Boa Project - Barros, Mauro Virgílio Gomes de; Nahas, Markus Vinicius; Hallal, Pedro Curi; Farias Júnior, José Cazuza de; Florindo, Alex Antonio; Barros, Simone Storino Honda de (Journal of Physical Activity and Health, 2009)