1. Department of Medicine, Koc University School of Medicine , Istanbul , Turkey
2. IIS-Fundacion Jimenez Diaz and School of Medicine, Universidad Autónoma de Madrid , Grupo Español de Estudio de la Nefropatia Diabetica, Madrid , Spain
3. Department of Medicine, Division of Nephrology, University Health Network , Toronto, Ontario , Canada
4. Department of Medicine, University of Toronto , Toronto, Ontario , Canada
5. Department of Medicine, Division of Nephrology, Koc University School of Medicine , Istanbul , Turkey