1. Institute for Maternal and Child Health-IRCCS ‘Burlo Garofolo’–Via dell'Istria 65/1,34137 Trieste,Italy
2. University of Trieste, via Piazzale Europa,1 34127 Trieste, Trieste,Italy
3. University of Ferrara, Department of Medical Sciences, Section of Infectious Diseases and Dermatology, via Fossato di Mortara n. 64/b,44121 Ferrara,Italy