1. Neonatal Unit, Department of Public Health and Pediatrics, University of Turin, Turin, Italy.
2. Neonatal Intensive Care Unit, Maria Vittoria Hospital, Turin, Italy.
3. Italian Association of Human Milk Banks, Milan, Italy.
4. Institute of Sciences of Food Production, National Research Council, Grugliasco, Italy.
5. Laboratorio GA Maccacaro, Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano, Milan, Italy.