1. Institute of Biomedicine and Molecular Immunology “Alberto Monroy,”, National Research Council (CNR), Palermo, Italy
2. Istituto Zooprofilattico Sperimentale della Sicilia “A Mirri,”, Area Diagnostica Specialistica, Laboratorio di Istopatologia ed Immunoistochimica, Palermo, Italy
3. Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Greenville, NC, USA
4. Biomedical Department of Internal Medicine and Specialties (DiBiMIS), University of Palermo, Palermo, Italy