1. Department of Neuroscience–Physiology Division, University of Torino Medical School, Italy
2. Center for Musculoskeletal Research, National Institute of Working Life, Umeå, Sweden
3. Universität Göttingen, Zentrum Neuro‐ und Pathophysiologie, Abteilung Neuro‐ und Sinnesphysiologie, Göttingen, Germany
4. Department of Clinical Neurosciences, Department of Physiology and Biophysics, University of Calgary, Calgary, Canada
5. Department of Neurophysiology, Institute for Medical Research, Belgrade, Yugoslavia