Universita di Torino, Italian Association of Human Milk Banks, Laboratory of Clinical Pathology and Microbiology, San Luigi Gonzaga Hospital, Laboratory of Clinical Pathology and Microbiology, San Luigi Gonzaga Hospital, Department of Public Health and Pediatric Sciences, University of Turin, University of Turin, Neonatal Care Unit of the University, City of Health and Science Hospital, Neonatal Care Unit of the University, City of Health and Science Hospital, Neonatal Care Unit of the University, City of Health and Science Hospital, Neonatal Care Unit, City of Health and Science Hospital, Neonatal Care Unit of the University, City of Health and Science Hospital, Neonatal Care Unit of the University, City of Health and Science Hospital, Neonatal Care Unit of the University, City of Health and Science Hospital, Laboratory of Molecular Virology, Department of Clinical and Biological Sciences, University of Turin and Independent