1. Department of Nephrology, Suleyman Demirel University School of Medicine, Isparta, Turkey
2. Department of Pulmonary Medicine, Istanbul Medeniyet University School of Medicine, Istanbul, Turkey
3. Nephrology Department, Dialysis and Renal Transplant Center, “Dr. C.I. Parhon” University Hospital, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
4. Dialysis Unit, School of Medicine, IIS-Fundacion Jimenez Diaz, Universidad Autónoma de Madrid, Madrid, Spain
5. Division of Nephrology, Department of Medicine, Koc University School of Medicine, Istanbul, Turkey