Professor, Otorhinolaryngology: Head and Neck Surgery, University of Pennsylvania

University of Medicine and Dentistry of New Jersey, New Jersey Medical School

Vice Chairman, Department of Neurological Surgery, University of washington

Dean, University of Oklahoma College of Medicine / Prof. of Neurosurgery / Chief Academic …

Professor of neurosurgery, Mount Sinai Medical center and Icahn school of medicine

Professor and Director, Division of Rhinology, University of Pennsylvania

Full Professor (Head and Neck Surgery), School of Medicine, Nicosia University

Columbia University, Department of Neurological Surgery

Professor of Otolaryngology - Head Neck surgery, Mayo Clinic

Dept. of Neurosurgery, Universitätsklinikum Erlangen