1. Department of Pediatrics, Immunology and Nephrology, Polish Mother’s Memorial Hospital Research Institute, Łódź, Poland
2. Division of Didactics in Pediatrics, Medical University of Łódź, Łódź, Poland
3. Department of Nephrology, Transplantation and Hypertension, Children’s Memorial Health Institute, Warsaw, Poland
4. Department of Pediatric Nephrology and Hypertension, Medical University of Gdańsk, Gdańsk, Poland
5. Department of Pediatric Nephrology, Medical University of Wrocław, Wrocław, Poland
6. Department of Pediatrics, Allergology and Nephrology, Military Medical Institute, Warsaw, Poland
7. Department of Pediatrics and Nephrology, Medical University of Białystok, Białystok, Poland
8. Department of Clinical Genetics and Pathology, University of Zielona Góra, Zielona Góra, Poland
9. Department of Pediatric Nephrology, Upper-Silesian Centre for Child's Health, Katowice, Poland
10. Department of Pediatric Nephrology, Medical University of Lublin, Lublin, Poland
11. Department of Pediatric Nephrology, Collegium Medicum Jagiellonian University, Krakow, Poland
12. Institute of Human Genetics and Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
13. Department of Pediatrics, University of Zielona Góra, Zielona Góra, Poland