Affiliation: | 1. Unit of Hygiene and Preventive, Environmental and Occupational Medicine, Department of Diagnostics and Public Health, University of Verona, Verona, Italy;2. Unit of Epidemiology & Medical Statistics, Department of Diagnostics and Public Health, University of Verona, Verona, Italy;3. Neonatology and Neonatal Intensive Care Unit, Mantua Hospital ‘C. Poma’, Mantua, Italy;4. Unit of Medical Statistics & Epidemiology, Department of Health Science, University of Pavia, Pavia, Italy |