1 Pediatric Oncology and Hematology Unit "Lalla Seràgnoli," Pediatric Unit, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Alma Mater Studiorum, University of Bologna, Bologna, Italy.
2 Infectious Diseases Unit, Department of Medical and Surgical Sciences, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Alma Mater Studiorum, University of Bologna, Bologna, Italy.
3 Specialty School of Pediatrics, Alma Mater Studiorum, University of Bologna, IRCCS, Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.