1. Health and Environment Unit, Regional Agency for Environment Protection/ARPA, Sicilia, Corso Calatafimi 217, 90129 Palermo, Italy
2. Institute of Biomedicine and Molecular Immunology, “Alberto Monroy,” National Research Council of Italy, Via Ugo La Malfa 153, 90146 Palermo, Italy
3. Department of Sciences for Woman and Child's Health, School of Pediatrics, University of Palermo, Via del Vespro 129, 90100 Palermo, Italy
4. Institute of Clinical Physiology, National Research Council (CNR) of Italy, Via Trieste 41, 56126 Pisa, Italy