1. David Geffen School of Medicine at UCLA; Los Angeles CA 90095
2. Division of General Internal Medicine; Los Angeles Biomedical Research Institute at Harbor-University of California Los Angeles (UCLA) Medical Center; Torrance CA 90502
3. Johns Hopkins University School of Medicine; Baltimore MD 21205
4. Division of Infectious Diseases; Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center; Torrance CA 90502