1. Department of Industrial Engineering (DII), University of Trento, Trento, Italy
2. Munich Institute of Robotics and Machine Intelligence (MIRMI), Technical University of Munich, München, Germany
3. SDU Robotics, The Maersk McKinney Moller Institute, University of Southern Denmark, Odense, Denmark
4. Department of Cognitive Robotics, Delft University of Technology, Delft, The Netherlands