Application of five frozen human-pooled serum samples assigned by the International Federation of Clinical Chemistry and Laboratory Medicine reference procedure in a traceability investigation of {gamma}-glutamyltransferase catalytic concentration measurements in China

C Xia, Q Tong, Q Wang, Z Tang, L Qi, S Chi, M Zhang, X Wang, H Li and G. Xu

Annals of Clinical Biochemistry 47 ( 3 ): 189 - 194 , 2010