1 Infectious Diseases Unit -ARNAS Civico Di Cristina, Benfratelli Palermo, Italy E-mail: iaria.chiara@gmail.com.
2 Department of Health Promotion Sciences and Mother and Child Care "G. D'Alessandro" University of Palermo Palermo, Italy E-mails: claudia.colomba@unipa.it, paola.dicarlo@unipa.it, francesco.scarlata@unipa.it, mtolomeo@hotmail.com, antonio.cascio03@unipa.it.