Spot PC ratio estimates of 24-hour proteinuria are more unreliable in lupus nephritis than in other forms of chronic glomerular disease. Issue 2 (3rd October 2013) - Birmingham, Daniel J; Shidham, Ganesh; Perna, Annalisa; Fine, Derek M; Bissell, Michael; Rodby, Roger; Remuzzi, Giuseppi; Petri, Michele; Hebert, Paul; Rovin, Brad H; Hebert, Lee A