1. Department of Medical Scientific Affairs, Pharma and Nutrition, Fresenius Kabi Deutschland GmbH, 61352 Bad Homburg, Germany
2. “Dr. Carol Davila” Teaching Hospital of Nephrology, 4 Calea Grivitei, Sector 1, 010731 Bucharest, Romania
3. Division of Nephrology Hypertension and Kidney Transplantation, Department of Medicine, University of California Irvine (UCI), Orange, CA 90286, USA
4. Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
5. Division of Kidney Diseases and Hypertension, George Washington University School of Medicine, Washington, DC 20037, USA