1 Gatsby Computational Neuroscience Unit, University College London, London, United Kingdom dayan@gatsby.ucl.ac.uk.
2 Translational Neuromodeling Unit, Institute for Biomedical Engineering, University of Zurich & ETH Zurich, Zurich, Switzerland and Department of Psychiatry, Psychotherapy and Psychosomatics, University of Zurich, Zurich, Switzerland qhuys@cantab.net.