Payman Vahedi, MD Assistant Professor of Neurosurgery and Spine Surgery,Division of Spine Surgery,Dept of Neurosurgery,Tehran Medical Sciences Branch, IAU,Tehran Fellowship in Spine Surgery (USA) Fellowship in Skull Base Surgery (Germany) EDUCATIONAL BACKGROUND: 2016-2017. AANS/CNS International Spine Fellow, Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, USA.   2010-2011 WFNS International Fellow in Neurosurgery and Spine Surgery, University of Tubingen, Germany 2005-2010 Resident in Neurosurgery, Tabriz University of Medical Sciences, Tabriz, Iran