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Gervasi MG, Osycka-Salut C, Caballero J, Vazquez-Levin M, Pereyra E, Billi S, Franchi A, Perez-Martinez S.Gervasi MG, et al.PLoS One. 2011 Feb 11;6(2):e16993. doi: 10.1371/journal.pone.0016993.PLoS One. 2011.PMID: 21347292Free PMC article.