Attention deficit hyperactivity disorder in preschool age children. Its epidemiological prevalence in Navarra and La Rioja, Spain

1. Marín-Méndez, J.J.
2. Álvarez-Gómez, M.J.
3. Borra-Ruiz, M.C.
4. Vallejo-Valdivielso, M.
5. Díez-Suárez, A.
6. De Castro-Manglano, P.
7. Soutullo-Esperón, C.