<prompt> All of the following are biomarkers of kidney function exceptNGALCystatin - CKIM - 2IL - 18  <response>: Biomarkers of kidney function :Cystatin - C.NGAL Neutrophil Gelatinase associated lipocalcin.KIM - 1 Kidney injury molecule - 1.IL - 18 Interleukin - 18. 