1. Department of Medical Sciences, Section of Pediatrics, University of Ferrara, Ferrara, Italy;
2. Bone Clinic, Department of Geriatric Care, Orthogeriatrics and Rehabilitation, Galliera Hospital, Genoa, Italy;
3. Department of Medical Sciences, Section of Internal and Cardio-Respiratory Medicine, University of Ferrara, Ferrara, Italy;
4. Center of Microcitemia and Congenital Anemias, Galliera Hospital, Genoa, Italy