- Correspondence to Marina Lacasaña Navarro, Escuela Andaluza de Salud Pública (EASP) (Andalusian School of Public Health), Campus Universitario de la Cartuja, c/Cuesta del Observatorio 4, CP 18180 Granada, Spain;
- Accepted April 11, 2011
- First published May 10, 2011.
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