Fig. 2From: Effect of blood contamination of cerebrospinal fluid on amino acids, biogenic amines, pterins and vitaminsHorizontal bar representation of the differences between spiked/non-spiked CSF ratio of all metabolites in the two experimental conditions. a Red bar: red blood cells (RBC) lysed before CSF freezing. b Blue bar: RBC removed from CSF by centrifugation before freezing. CSF samples were spiked with 20% of whole bloodBack to article page