1 Infectious and Tropical Diseases Unit, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G D'Alessandro", University of Palermo, Palermo, Italy.
2 Checkpoint Palermo Fast-Track City, Casa dei Diritti, Palermo, Italy.
3 Microbiology and Virology Unit, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G D'Alessandro", University of Palermo, Palermo, Italy.