[Determining factors of physical activity level in school children and adolescents: the OPACA study].
Cano Garcinuño
A
A
Centro de Salud de Villamuriel de Cerrato, Palencia, Spain. acanog@saludcastillayleon.es
Pérez García
I
I
Casares Alonso
I
I
Alberola López
S
S