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; Palermo Fast-Track City, 90100, Palermo, Italy.
2 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; Palermo Fast-Track City, 90100, Palermo, Italy. Electronic address: antonio.cascio03@unipa.it.