[1] University of Ferrara,Section of Clinica Chirurgica, Department of Morphology, Surgery, and Experimental Medicine, S. Anna University Hospital of Ferrara
[2] University of Parma,Department of Surgery, University Hospital of Parma
[3] University of Udine,Section of Clinica Chirurgica, Department of Medical and Biological Science, S. Maria della Misericordia University Hospital of Udine
[4] University of Ferrara,Section of Endocrinology and Internal Medicine, Department of Medical Sciences, S. Anna University Hospital of Ferrara
[5] Duke University,Division of Endocrinology
[6] Azienda Ospedaliero-Universitaria di Ferrara,Clinica Chirurgica, Arcispedale S. Anna