1. Department of Pediatric Nephrology and Solid Organ Transplantation and ‡Department of Nephrology
and Renal Transplantation, University Hospitals Leuven, B-3000 Leuven, Belgium
2. Laboratory for Pediatrics, Department of Development & Regeneration and ⊥Laboratory of Nephrology, KU Leuven, 3000 Leuven, Belgium
3. Laboratory for Genetic, Endocrine, and Metabolic Disorders and ∥Department of Pharmacology
and Toxicology, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands