Maria T Barrio-Lopez, Maira Bes-Rastrollo, Juan J Beunza, Alejandro Fernandez-Montero, Martin Garcia-Lopez and Miguel A Martinez-Gonzalez*
* Corresponding author: Miguel A Martinez-Gonzalez mamartinez@unav.es
BMC Public Health 2011, 11:867 doi:10.1186/1471-2458-11-867
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