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