1 Division of Surgery, Istituto Auxologico Italiano IRCCS, Milan, Italy. gianlorenzo.dionigi@unimi.it.
2 Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy. gianlorenzo.dionigi@unimi.it.
3 Department of Surgery, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, University, Milan, Italy.
4 Division of Endocrine and Metabolic Diseases, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Istituto Auxologico Italiano, Milan, Italy.
5 Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
6 Department of Surgery, KUMC Thyroid Center, Korea University Hospital, Korea University College of Medicine, Seoul, Korea.
7 Department of Surgical, Medical and Molecular Pathology and Critical Care, University of Pisa, Pisa, Italy.