label: quantitative measurement by liquid chromatography with tandem mass spectrometry of allo-isoleucine, leucine, isoleucine, valine in patient-collected blood card sample, for maple syrup urine disease monitoring
label_lc: quantitative measurement by liquid chromatography with tandem mass spectrometry of allo-isoleucine, leucine, isoleucine, valine in patient-collected blood card sample, for maple syrup urine disease monitoring