Dist. Univ. Research Prof of Math and Physics, Univ. of Maryland

Distinguished Professor of Pediatrics

University of the Witwatersrand

Professor of Biostatistics, University of Michigan

Professor of Infectious Diseases, Univ. of Modena and Reggio Emilia

Professor of Microbiology, Immunology and Pathology

FHI 360

Hospital Ramón y Cajal, University of Alcala, Madrid

Professor of Medicine, Icahn School of Medicine at Mount Sinai

Denver Public Health