1. Robotics and Machine Intelligence Laboratory, The Hong Kong Polytechnic University, Hong Kong SAR, China
2. Learning Algorithms and Systems Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
3. Visual And Multimodal Applied Learning Laboratory (VANDAL), Politecnico di Torino, Turin, Italy
4. DIBRIS, Università degli Studi di Genova, Genoa, Italy
5. Laboratory for Computational and Statistical Learning (IIT@MIT), Istituto Italiano di Tecnologia and Massachusetts Institute of Technology, Cambridge, MA, USA
6. Machine Learning Genoa (MaLGa) Center, Università di Genova, Genoa, Italy
7. Artificial and Mechanical Intelligence research line (AMI), Istituto Italiano di Tecnologia, Genoa, Italy