1. Department of Pediatrics and Department of Human Genetics, University of Michigan, 1150 W. Medical Center Drive Drive, Ann Arbor, MI, USA
2. Institute of Human Genetics, University of Erlangen–Nuremberg, Schwabachanlage 10, Erlangen, Germany
3. Paediatric Nephrology, Great Ormond Street Hospital, Great Ormond Street, London, WC1 3JH, UK
4. Department of Pediatric Medicine, National Institute of Child Health, Rafiqi H J Road, Karachi, Pakistan
5. Nephrology Unit, University Children's Hospital Zurich, Steinwiesstrasse 75, 8032 Zurich, Switzerland
6. Department of Pediatrics, King Abdul-Aziz University Hospital, Ali Al-Murtada Road, Jeddah, Saudi Arabia
7. Howard Hughes Medical Institute, Chevy Chase, Maryland