Vieira, E.M. et al. 2004. What do they do after class? extra curriculum activities of medical students of ribeirão preto-University of São Paulo. Medicina (Ribeirao Preto). 37, 1/2 (Jun. 2004), 84–90. DOI:https://doi.org/10.11606/issn.2176-7262.v37i1/2p84-90.