1. Department of Biomedicine, Molecular Nephrology, University Hospital, Basel;
2. Institute of Physiology with Center of Integrative Human Physiology, University of Zurich, and
3. Division of Nephrology, University Hospital Zurich, Zurich;
4. Department of Medicine, Miller School of Medicine, University of Miami, Miami, Florida; and
5. Institute of Clinical Pathology, University Hospital, and
6. Department of Internal Medicine, Kantonsspital Bruderholz, University of Basel, Basel, Switzerland