1. Department of Basic Medical Sciences, Neuroscience and Sensory Organs, University of Bari A. Moro, Bari, Italy
2. Neurobiology Group, SISSA, Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy
3. Institute of Biophysics, CNR, Genova, Italy
4. Monell Chemical Senses Center, Philadelphia, PA, USA