Falcão, M. C.; Okay, Y.; Ramos, J. L. A. Relationship Between Plasma Creatinine Concentration and Glomerular Filtration in Preterm Newborn Infants . Rev. Hosp. Clín. 1999, 54 (4), 121-126. https://doi.org/10.1590/S0041-87811999000400004.