- Correspondence to Dr Maira Bes-Rastrollo, Department of Preventive Medicine and Public Health, Facultad de Medicina-Clínica, Universidad de Navarra, Ed. Investigación, C/ Irunlarrea 1, Pamplona, Navarra 31008, Spain;
- Received December 17, 2013
- Revised April 1, 2014
- Accepted April 6, 2014
- First published April 23, 2014.
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