Affiliation: | From the ‡Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania 15282.;the §Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213.;the ¶Division of Infectious Disease, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California 90502, and ;the ‖David Geffen School of Medicine at UCLA, Los Angeles, California 90024 |