1. Meaning and application of urine chemistries;Rose,1994
2. Use of urinary indexes in renal failure in the newborn;Ellis;Am J Dis Child,1982
3. Usefulness of fractional excretion of sodium in critically ill pre-term newborns;Tapia-Rombo;Arch Med Res,1997
4. Transtubular potassium concentration gradient (TTKG) and urine ammonium in differential diagnosis of hypokalemia;Joo;J Nephrol,2000
5. The utility of the transtubular potassium gradient in the evaluation of hyperkalemia;Choi;J Am Soc Nephrol,2008