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Barriers, facilitators and preferences for the physical activity of school children. Rationale and methods of a mixed study

María Martínez-Andrés, Úrsula García-López, Myriam Gutiérrez-Zornoza, Beatriz Rodríguez-Martín, María Jesús Pardo-Guijarro, Mairena Sánchez-López, Eugenio Cortés-Ramírez and Vicente Martínez-Vizcaíno*

BMC Public Health 2012, 12:785  doi:10.1186/1471-2458-12-785

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