1. Department of Social Neuroscience, Max Planck Institute for Human Cognitive and Brain Sciences, 04103 Leipzig, Germany, 2Swiss Center for Affective Sciences, University of Geneva, 1205 Geneva, Switzerland, 3Laboratory for Social and Neural Systems Research, Department of Economics, University of Zurich, 8006 Zurich, Switzerland, and 4Mind and Life Institute, Hadley, MA 01035, USA