1. Department of Neurology; RWTH Aachen University; Pauwelsstr. 30 52074 Aachen Germany
2. JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging; Forschungszentrum Jülich GmbH and RWTH Aachen University; 52074 Aachen Germany
3. Department Clinical Neurophysiology; Centre for the Research and Rehabilitation of Hereditary Ataxias; Calle Libertad 26 Holguín 80100 Cuba
4. Department of Imaging; Clinical-Surgical Hospital “Lucía Iñiguez”. Avenue “Celia; Sanchez 1 Holguín Cuba
5. Department Molecular Genetics; Centre for the Research and Rehabilitation of Hereditary Ataxias; Calle Libertad 26 Holguín 80100 Cuba
6. Experimental Neurology; Goethe University Medical School; 60590 Frankfurt/Main Germany