1. Dept. of Neurological Rehabilitation, Klinik Berlin/Charité University Hospital, 14089 Berlin, Germany; Dept. of Automation and Robotics, Fraunhofer IPK, 10587 Berlin, Germany. henning.schmidt@ieee.org
2. Dept. of Neurological Rehabilitation, Klinik Berlin/Charité University Hospital, 14089 Berlin, Germany. Mirjam.Volkmar@gmx.de
3. Dept. of Neurological Rehabilitation, Klinik Berlin/Charité University Hospital, 14089 Berlin, Germany. cowerner@zedat.fu-berlin.de
4. Dept. of Neurological Rehabilitation, Klinik Berlin/Charité University Hospital, 14089 Berlin, Germany. ingohelmich@googlemail.com
5. Dept. of Automation and Robotics, Fraunhofer IPK, 10587 Berlin, Germany. frank.piorko@ipk.fraunhofer.de
6. Dept. of Automation and Robotics, Fraunhofer IPK, 10587 Berlin, Germany. joerg.krueger@ipk.fraunhofer.de
7. Dept. of Neurological Rehabilitation, Klinik Berlin/Charité University Hospital, 14089 Berlin, Germany. bhesse@zedat.fu-berlin.de