1 Unit of Ethology, Department of Biology, University of Pisa, Italy; Museum of Natural History, University of Pisa, Italy.
2 Department of Psychology, University of Torino, Italy.
3 Department of Psychology, University of Torino, Italy; Department of Medical and Clinical Psychology and CoRPS - Center of Research on Psychology in Somatic diseases - Tilburg University, Tilburg, the Netherlands. Electronic address: marco.tamietto@unito.it.
4 Department of Psychology, University of California, San Diego, USA; Faculty of Psychology, SWPS University of Social Sciences and Humanities, Warsaw, Poland.
5 Department of Life Sciences and Systems Biology, University of Torino, Italy.