1. Early Infancy Special Care Unit, Regina Margherita Children Hospital, A.O.U. Città della Salute e della Scienza di Torino, 10126 Torino, Italy
2. Paediatric Laboratory, Department of Public Health and Pediatric Sciences, Medical School, University of Turin, 10136 Turin, Italy
3. BioMole srl, Via Quarello 15/A, 10135 Turin, Italy
4. Department of Pediatrics, Infectious Diseases Unit, Regina Margherita Children’s Hospital, University of Turin, Piazza Polonia 94, 10126 Turin, Italy