1. Department of Psychiatry and Behavioral Sciences, The M.I.N.D. Institute, The Center for Neuroscience and the California National Primate Research Center; University of California, Davis; Davis California 95817
2. Laboratory of Brain and Cognitive Development, Department of Medicine, Fribourg Center for Cognition; University of Fribourg; 1700 Fribourg Switzerland
3. Laboratory for Experimental Research on Behavior, Institute of Psychology; University of Lausanne; 1015 Lausanne Switzerland