Portugal
Schafferer, C., Yeh, C.Y., Chen, S.H. 2018
Filippidis, F.T., Laverty, A.A., Hone, T. et al. 2017
Alves, J., Kunst, A.E., Perelman, J. 2015
European Commission 2015
Pederson, H., Floristean, A., Iseppi, L. et al. 2014
Gallus, S., Lugo, A., La Vecchia, C. et al. 2012
Nguyen, L., Rosenqvist, G., Pekurinen, M. 2012
Chaloupka, F.J., Peck, R.M., Tauras, J.A. et al. 2009
European Commission 2009
Gallus, S., Schiaffino, A., La Vecchia, C. et al. 2006