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 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. Electronic address: antonio.cascio03@unipa.it.