1. Department of Biological, Geological and Environmental Sciences, University of Catania, Catania, Italy
2. National Research Council, Institute for Agricultural and Forest Systems in the Mediterranean, Catania, Italy
3. Experimental Zooprophylactic Institute of Sicily “A. Mirri”, Catania, Italy
4. Centro Biomedico ASTER, Catania, Italy
5. U.O. Fisiopatologia della Riproduzione Umana - Clinica del Mediterraneo, Ragusa, Italy