1. UCL Institute of Cognitive Neuroscience, 17 Queen Square, London WC1N 3AR, UK
2. Wellcome Trust Centre for Neuroimaging, University College London, 12 Queen Square, London WC1N 3BG, UK
3. Interacting Minds Project, Institute of Anthropology, Archaeology, Linguistics, Aarhus University, Norrebrogade 44, Building 10 G, 8000 Aarhus, Denmark
4. Centre of Functionally Integrative Neuroscience, Aarhus University Hospital, Norrebrogade 44, Building 10 G, 8000 Aarhus, Denmark
5. Institute of Cancer, Barts and The London School of Medicine and Dentistry, Charterhouse Square, London EC1M 6BQ, UK