Methods The cord serum concentration of prealbumin(PA),transferrin(TRF) and retinol-binding-protein(RBP) were determined by Date Behring BNP with the rate nephelometry.

• 方法用美国Dade Behring BNP特定蛋白分析仪采用速率散射比浊法测定新生儿脐静脉血中RBP、PA、TRF的含量。