Improving the prognosis of patients with severely decreased glomerular filtration rate (CKD G4+): conclusions from a Kidney Disease: Improving Global Outcomes (KDIGO) Controversies Conference. Eckardt, Kai-Uwe; Bansal, Nisha; Coresh, Josef; Evans, Marie; Grams, Morgan E.; Herzog, Charles A.; James, Matthew T.; Heerspink, Hiddo J. L.; Pollock, Carol A.; Stevens, Paul E.; Tamura, Manjula Kurella; Tonelli, Marcello A.; Wheeler, David C.; Winkelmayer, Wolfgang C.; Cheung, Michael; Hemmelgarn, Brenda R.; Conference Participants. Kidney International. 2018; : . doi:10.1016/j.kint.2018.02.006Article