1. Elastic Lightweight Robotics Group, Robotics Research Institute, Technische Universität Dortmund Dortmund Germany
2. Institute for Mechatronic Systems in Mechanical Engineering, Technische Universität Darmstadt Darmstadt Germany
3. Institut of Robotics and Mechatronics, DLR German Aerospace Center, Oberpfaffenhofen Germany
4. Cognitive Neuropsychology, Department of Psychology University of Zurich Zurich Switzerland