1 Department of Advanced Medical and Surgical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy.
2 Department of Medicine, Fleischer Institute for Diabetes and Metabolism (FIDAM), Einstein-Mount Sinai Diabetes Research Center (ES-DRC), Albert Einstein College of Medicine, New York, NY, United States.
3 Department of Advanced Biomedical Science, "Federico II" University, Naples, Italy.
4 Department of Biochemistry, Biophysics and General Pathology, School of Medicine and Surgery, University of Campania, Naples, Italy.