Science
Vol.319, No.5864, 8 February 2008
Revista de Saude Publica
Vol.41, Supplemento 1, Septembro 2007
Bulletin de la Societe de Pathologie Exotique
Vol.101, No.1 2008
British Medical Journal
Vol.336, No.7640, 16 February 2008
South African Medical Journal
Vol.98, No.1, January 2008
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