Renal Insufficiency, Chronic

• Southampton Children's Hospital — Southampton, Hampshire, United Kingdom
• Alder Hey Children's Hospital — Liverpool, Merseyside, United Kingdom
• Birmingham Children's Hospital — Birmingham, West Midlands, United Kingdom

• University of Medicine and Pharmacy "Grigore T. Popa" — Iași, Romania

• Baskent University — Ankara, Türkiye, Turkey (Türkiye)

• University Medical Centre — Ljubljana, Osrednjeslovenska, Slovenia

• CHU Caen Normandie — Caen, France

• CMAX Clinical Research Pty Ltd — Adelaide, South Australia, Australia

• AMC Hospital — Bandung, West Java, Indonesia

• Private Clinic — Cairo, Egypt

• Addenbrooke's Hospital — Cambridge, Cambridgeshire, United Kingdom

Not specified