1. Centre for Social Evolution, Department of Biology, University of CopenhagenUniversitetsparken 15, 2100 Copenhagen, Denmark
2. Department of Medicinal Chemistry, University of CopenhagenJagtvej 162, 2100 Copenhagen, Denmark
3. Department of Natural Sciences, Bioorganic Chemistry, University of CopenhagenThorvaldsensvej 40, 1871 Frederiksberg, Denmark
4. Lehrstuhl für Neurobiologie, University of KonstanzUniversitätsstrasse 10, 78457 Konstanz, Germany