BMC Nephrology Lamb, E J, Brettell, E A, Cockwell, P, Dalton, N, Deeks, J J, Harris, K, Higgins, T, Kalra, P A, Khunti, K, Loud, F, Ottridge, R S, Sharpe, C C, Sitch, A J, Stevens, P E, Sutton, A J & Taal, M W 2014, ' The eGFR-C study : Accuracy of glomerular filtration rate (GFR) estimation using creatinine and cystatin C and albuminuria for monitoring disease progression in patients with stage 3 chronic kidney disease-Prospective longitudinal study in a multiethnic population ', BMC Nephrology, vol. 15, no. 1, 13 . https://doi.org/10.1186/1471-2369-15-13