%0 Journal Article %T Clinical Vitamin B6 Analysis: An Interlaboratory Comparison of Pyridoxal 5′-Phosphate Measurements in Serum %A Rybak, Michael, E %A Jain, Ram, B %A Pfeiffer, Christine, M %J Clinical Chemistry %V 51 %N 7 %@ 0009-9147 %D 2005-07-01 %I Oxford Academic %~ DeepDyve