University of Connecticut

Nuffield Department of Medicine, University of Oxford

Professor for Infectious Diseases, University Hospital Zurich

Macfarlane Burnet Institute for Medical Research & Public Health

OHSU

University of Hertfordshire (Egypt campus)

National and Kapodistrian University of Athens, School of Medicine

Emeritus Professor of Clinical Medicine, University of California San Diego

University of California, San Francisco

Professor of Pathology, University of Pittsburgh