F. N. Porkhun
First Pavlov State Medical University of St. Petersburg, St Petersburg, Russia
Russian Federation

MD, Neurologist, Assistant, Department of Neurology and Manual Medicine, Faculty of Postgraduate Studies, the First Pavlov State Medical University of St. Petersburg. 

V. V. Nikitina
First Pavlov State Medical University of St. Petersburg, St Petersburg, Russia
Russian Federation

MD, PhD, DSc, Leading Researcher, Associate Professor of Neurology, Department of Neurology and Manual Medicine, Faculty of Postgraduate Studies, the First Pavlov State Medical University of St. Petersburg;