1. Fraunhofer IPK,Department of Automation,Berlin,Germany
2. Technical University Munich (TUM),Chair of Robotics and Systems Intelligence and Munich Institute of Robotics and Machine Intelligence,Munich,Germany,D-80797
3. Politecnico di Milano,Department of Mechanical Engineering,Milano,Italy
4. DGIST,Department of Robotics and Mechatronics Engineering,Daegu,Korea,42988
5. Scuola Universitaria Professionale Della Svizzera Italiana (SUPSI), Università Della Svizzera Italiana (USI) IDSIA-SUPSI,Istituto Dalle Molle di Studi Sull’Intelligenza Artificiale (IDSIA),Lugano,Switzerland