1. Department of Cardiothoracic and Respiratory Sciences, Section of Endocrinology, Faculty of Medicine and Surgery, Second University of Naples, Naples, Italy.
2. Department of Clinical and Experimental Medicine and Surgery “F. Magrassi, A. Lanzara”, Section of Internal Medicine, Faculty of Medicine and Surgery, Second University of Naples, Naples, Italy.
3. Greenlane Clinical Centre and Auckland City Hospital Auckland, New Zealand.