Ethical Statement
The authors confirm that the ethical policies of the journal, as noted on the journal’s author guidelines page, have been adhered to the European Directive 2010/63/EU, in accordance with the rules of the ethic committee of the Istituto Zooprofilattico Sperimentale del Mezzogiorno (Portici, Italy) and the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health.