1 Skin Cancer Center Ruhr-University, Department of Dermatology, Venereology and Allergology, Ruhr-University Bochum, St Josef Hospital, Gudrunstraße 56, 44791, Bochum, Germany.
2 Department of Neurology, Ruhr-University Bochum, St Josef Hospital, Gudrunstraße 56, 44791, Bochum, Germany.
3 Department of Neurology, Sechenov First Moscow State Medical University, Moscow, Russia.