Affiliation: | (1) Malaria Program, Naval Medical Research Institute Annex, 12300 Washington Avenue, 20852 Rockville, MD, USA;(2) Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland, USA;(3) Vical Incorporated, San Diego, California, USA;(4) Present address: The Institute for Genomic Research, Gaithersburg, Maryland |