1. Division of Nephrology, Albert Einstein College of Medicine, Montefiore Health System, Bronx, New York
2. Section of Nephrology, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut
3. Kidney Health Service, Royal Brisbane and Women's Hospital, Herston, Queensland, Australia
4. Conjoint Internal Medicine Laboratory, Chemical Pathology, Pathology Queensland, Herston, Queensland, Australia
5. Faculty of Medicine, University of Queensland, Herston, Queensland, Australia
6. Department of Physiology, Augusta University, Medical College of Georgia, Augusta, Georgia
7. Nephrology Department, Hospital Curry Cabral, Centro Hospitalar Universitário de Lisboa Central, Lisboa, Portugal
8. Nova Medical School, Lisboa, Portugal