1. Department of Veterinary Sciences; University of Pisa; Viale delle Piagge 2 Pisa I-56124 Italy
2. Endocrinology Unit; Azienda Ospedaliero-Universitaria Pisana; Via Roma 67 Pisa I-56100 Italy
3. Science Information and Documentation Centre (CeDIS); Innovet Italia SRL; Via Egadi 7 Milano I-20144 Italy
4. Innovative Statistical Research SRL; Via Prato Della Valle 24 Padova I-35123 Italy