ALB and chronic kidney disease: In particular, responders considered assessment of serum electrolytes (potassium and sodium) (8/9), serum creatinine (9/9), serum creatinine-based estimated clearance, using the Cockroft–Gault equation (8/9) and estimated glomerular filtration rate by the chronic kidney disease epidemiology collaboration (CKD-EPI) equation or others (id est the MDRD equation) (8/9) as relevant and to be performed every 6 months, while urine dipstick (8/9) and albumin-to-creatinine ratio in urine (6/9) were to be performed every 12 months.