1. Biomedical Department of Internal Medicine & Medical Specialties, University of Palermo, Via del Vespro, 141, 90127, Palermo, Italy
2. Euro–Mediterranean Institute of Science & Technology, Italy
3. Division of Endocrinology, Diabetes & Metabolism, University of South Carolina School of Medicine, Columbia, SC, USA
4. Department of Hypertension, Medical University of Lodz, Poland