Chronic Kidney Disease (stages 4 and 5)

• Family Health Unit 1 - ULS Coimbra (Intervention) — Coimbra, Portugal
• Family Health Unit 2 - ULS Coimbra (Control) — Coimbra, Portugal

• Emory University — Atlanta, Georgia, United States
• NYU Langone Health — New York, United States

• Clinical Research Centre for Rare Diseases Aldo e Cele Daccò — Ranica, BG, Italy

Not specified

• University Medical Center Groningen — Groningen, Provincie Groningen, Netherlands

• Manchester Royal infirmary — Manchester, United Kingdom

Not specified

• Assistance Publique - Hôpitaux de Paris (AP-HP), Division of Geriatry — Paris, France
• Biogem — Ariano Irpino, Italy
• Lithuanian University of Health Sciences — Kaunas, Lithuania
• University Medical Center Groningen, Department of Nephrology — Groningen, Netherlands

• Hospital Universitario Infanta Leonor — Madrid, Spain
• Hospital Universitario Infanta Leonor — Madrid, Spain

Not specified