1. Department of Electrical and Computer Engineering, Centre for Cognitive and Brain Sciences, the Centre for Artificial Intelligence and Robotics, Institute of Collaborative Innovation, Faculty of Science and Technology, University of Macau, Taipa, Macau
2. Department of Computer Science and the Brain Mind Institute, University of Western Ontario, London, ON, Canada
3. ISR and DBE-IST, Universidade de Lisboa, Lisbon, Portugal
4. Swartz Center for Computational Neuroscience, Institute for Neural Computation, University of California San Diego, La Jolla, CA, USA