Increase in cigarette smoking and decrease in the level of physical activity among Spanish adolescentes. Avena study

1. Tercedor Sánchez, P.
2. Martín-Matillas, M.
3. Chillón, P.
4. Pérez López, I.J.
5. Ortega, F.B.
6. Wärnberg, J.
7. Ruiz, J.R.
8. Delgado, M.