Suijlen, J.D.E. van

method laboratory serum result reference value measurement quality testing comparison sample determination patient sodium ferritin procedure chemistry blood chern analyzer candidate reference method system difference chapter accuracy imprecision calibration table assay candidate instrument reference method concentration assay results evaluation performance 1 b 1 point-of-care deficiency control water inaccuracy study biochem gem premier figure electrolyte group cbl deficiency analysis blood gas potassium premier sendx monitoring reference method values protein point-of-care testing serum ferritin material error turnaround slope clinician analyte aspect multi-point calibration procedure minute department criteria intercept variation preparation van suijlen jde level tatmax cobalamin introduction method comparison data hospital