Prevalence of hypospadias in Italy according to severity, gestational age and birthweight: an epidemiological study oleh Magnani Cinzia, Gragnani Giuseppe S, Giuffrè Mario, Gerola Orietta, Di Stefano Maria C, De Santis Luisa, Danieli Roberto, Cocchi Guido, Celandroni Amerigo, Pardi Daniela, Bertelloni Silvano, Scaramuzzo Rosa T, Ghirri Paolo, Meossi Cristiano, Merusi Ilaria, Sabatino Giuseppe, Tumini Stefano, Corsello Giovanni, Boldrini Antonio