Affiliation: | 1.Clinical and Evaluational Epidemiology Service. Provincial Health Agency, Trento, Italy; 2.Clinical and Evaluational Epidemiology Service. Provincial Health Agency, Trento, Italy; 3.Obstetrics and Gynaecology Unit, Ospedale S. Chiara Trento. Provincial Health Agency, Trento, Italy; 4.Paediatrics Unit, Ospedale S. Maria del Carmine, Rovereto. Provincial Health Agency, Trento, Italy |