1. Section of Nephrology, Department of Cardiothoracic and Respiratory Sciences-Second University of Naples, Naples, Italy;
2. Institute of Genetics and Biophysics of the National Research Council (CNR), Naples, Italy;
3. Department of Biochemistry, Biophysics and General Pathology, Second University of Naples, Naples, Italy;
4. Eye Clinic, Multidisciplinary Department of Medical, Surgical and Dental Sciences-Second University of Naples, Naples, Italy; and
5. Departments of Internal Medicine and Physiology and the Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas