Nikolaos Grigoriadis is a Professor and the Head of the Second Department of Neurology, School of Medicine, Aristotle University of Thessaloniki, Greece. Nikolaos Grigoriadis earned an M.D. degree and a Ph.D. from the School of Medicine, Aristotle University of Thessaloniki, in 1989 and 1995, respectively. Nikolaos Grigoriadis was a Visiting Fellow at the Department of Neurology and Neuroimmunology, Hadassah University Hospital (January–March 1997 and May–November 2000), a Visiting Researcher at the Department of Neurology, University of Innsbruck (August 2003), and a Visiting Fellow at the Center for Βrain Research, Neuroimmunology Branch, Medical University of Vienna (September 2006–April 2007). Nikolaos Grigoriadis served as a Resident in Neurology (1992–1996), a Lecturer in Neurology (2000–2005), an Assistant Professor in Neurology (2005–2011), and an Associate Professor in Neurology (2011–2015) at the 2nd University Neurological Department, AUTH, AHEPA University General Hospital of Thessaloniki.