Professor neurology, Schulthess Clinic Zurich

Neurosurgery Resident, Duke University Medical Center

Yale University

Professor and Chair - The Warren Alpert Medical School of Brown University

Professor of Orthopedic Surgery, University of Louisville

James J. Maguire Jr. Professor of Spine Research, Thomas Jefferson University

The Ohio State University

University of British Columbia

UCSF

Department of Biomedical, Surgical and Dental Sciences, University "La Statale", Milan (Italy