“…However, other authors suggest that estimation of GFR with the use of equations consisting of variables such as serum creatinine, age, sex, body mass (i.e., Cockcroft–Gault, Bjornsson, Hull, and Mawer equations) correlates with pre-donation 24-h urine creatinine clearance and renal cortex volume measured using computed tomography (CT) [ 29 , 30 ]. Nevertheless, eGFR still appears insufficient compared to exogenous filtration markers [ 31 ] whose selection, if they are used, should be individualized and the evaluation should be based on more than one equation [ 32 ].…”