This is a preview. Log in through your library . Abstract Our main goal is to determine the general solution of the functional equation f1(xy) + f2(xy-1) = f3(x) + f4 ...

A new equation for calculating a person's kidney function — their estimated glomerular filtration rate (eGFR) — worked as well with serum cystatin C as it did with serum creatinine as the biomarker.