1Marmara University, School of Medicine, Department of Internal Medicine, Division of Nephrology, Istanbul, Turkey
2Ankara University, School of Medicine, Department of Internal Medicine, Division of Nephrology, Ankara, Turkey.
3Çukurova University, School of Medicine, Department of Internal Medicine, Division of Nephrology, Adana, Turkey.
4Marmara University, School of Medicine, Department of Internal Medicine, Division of Rheumatology, Istanbul, Turkey
DB Atas, GK Sahin, S Sengul, B Kaya, S Paydaş, F Alibaz-Oner, H Direskeneli, S Tuglular, E Asicioglu