
Keywords: UCBfree; free bilirubin; TSB; total serum bilirubin; UCBfree/TSB ratio; free bilirubin/total serum bilirubin ratio; Ka; bilirubin-albumin binding affinity; GA; gestational age; BW; birth weight; HRP; horseradish peroxidase; GEE; Generalized Estimating Equ