Effect of albumin concentration on the assay of serum free thyroxine by equilibrium radio-immunoassay with labeled thyroxine analog (Amerlex® free T4 ) - Amino, N; Nishi, K; Nakatani, K; Mizuta, H; Ichihara, K; Tanizawa, O; Miyai, K (Clin. Chem, 1983)