Health Policy and Planning
Vol.23, No.2, March 2008
Revista Do Instituto De Medicina Tropical De Sau Paulo
Vol.50, No.1, Jan-Feb 2008
(not currently online)
Science
Vol.319, No.5867, 29 February 2008
Nature
Vol.452, No.7183, 6 March 2008
Emerging Infectious Diseases
Vol.14, No.3, March 2008
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