1. Department of AnthropologyHirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences Wroclaw 50‐449 Poland
2. Department of Psychophysiology of Cognitive Processes, SWPS University of Social Sciences and Humanities Warsaw 03‐815 Poland
3. Department of Cognitive Psychology, Leiden Institute for Brain and CognitionLeiden University Leiden 2333AK The Netherlands
4. Department of Environmental Health, Faculty of Health SciencesJagiellonian University Medical College Krakow 31‐531 Poland