Affiliation: | US Naval Medical Research Unit No.3, Cairo, Egypt (S.F. Ahmed, P.J. Sebeny, J.D. Klena, G. Pimentel, A. Mansour, J. Bruton, S.Y.N. Young);;Ministry of Health, Cairo (A.M. Naguib);;Washington University School of Medicine, St. Louis, Missouri, USA (L.R. Holtz, D. Wang) |