Repositorio Institucional de la Universidad de Oviedo

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This research was supported by the MICINN-PSI-2012-34743 research project to ML, and the research grant BP10-016 (FICYT) to PG. We would like to thank Javier Morán Suarez, Marta Méndez López and Natalia Arias del Castillo for their advice, and Piedad Burgos and Begoña Valdes for their technical assistance. The study was designed by ML and PG. Testing and data collection were performed by PG, AS, and AB. ML, PG, and DD performed the data analysis and wrote the original manuscript. All authors approved the final version of the manuscript for submission.