Professor of Neurosurgery and Hematology & Medical Oncology, Emory University

Professor and Chairman, Institute of Neuropathology, University of Bonn

Professor of Laboratory Medicine and Pathology, Mayo Clinic

University of North Carolina

Associate Professor, Harvard Medical School

Professor of Neurology, German Cancer Research Center and Heidelberg University

Professor of Neurosurgery University of Birmingham

Columbia University

University of California Los Angeles

Department of Neurosurgery, University of Tuebingen