1. Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Nuffield Department of Population Health, University of Oxford , Oxford , UK
2. School of Cardiovascular and Metabolic Health, College of Medical and Veterinary Life Sciences, University of Glasgow , Glasgow , UK
3. International Renal Research Institute of Vicenza, Department of Nephrology, Dialysis and Transplantation, San Bortolo Hospital , Vicenza , Italy