to determine whether or not laboratories participating in the ligand assay survey of the college of american pathologists can measure cobalamin ( vitamin b-12 ) in the presence of cobalamin analogues , either cobalamin or cobinamide ( a model for the non-physiological analogues of cobalamin ) was added to pooled human serum , and aliquots of the various samples were submitted to the participants .
C0042845
cobalamin
C2917443
analogues