Spectrophotometry, InfraredCaprylatesBreath TestsSpectroscopy, Fourier Transform InfraredMass SpectrometrySpectrometry, Mass, Electrospray IonizationTandem Mass SpectrometryGas Chromatography-Mass SpectrometrySpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationChromatography, LiquidChromatography, High Pressure LiquidSpectrometry, Mass, Secondary IonProteomicsSpectrometry, Mass, Fast Atom BombardmentThermographyMolecular Sequence DataProteomeAmino Acid SequenceSpectroscopy, Near-InfraredFourier AnalysisCalibrationMolecular Structure