Revista Do Instituto De Medicina Tropical De Sao Paulo
Vol.50, No.3, May-June 2008
(not available online)
Science
Vol.321, No.5885, 4 July 2008
Nature
Vol.454, No.7201, 10 July 2008
Sexually Transmitted Diseases
Vol.35, No.7, July 2008
American Journal of Epidemiology
Vol.168, No.1, July 1 2008
Tropical Diseases Bulletin
Vol.105, No.7, July 2008
(not available online)
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