matrix assisted laser desorption ionization time of flight mass spectrometry article 78 nonhuman 58 unclassified drug 56 priority journal 50 Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization 48 controlled study 42 Animals 36 Mass spectrometry 30 mass spectrometry 30 carbohydrate analysis 22 human 20 Article 18 oligosaccharide 18 Desorption 16 Humans 16 Oligosaccharides 16 animal cell 16 chemical structure 16 molecular weight 16 Polysaccharides 14 anion exchange chromatography 14 chemistry 14 gentisic acid 14 proton nuclear magnetic resonance 14 ultraviolet spectroscopy 14 Mass spectrometers 12 Molecular Sequence Data 12 Trypanosoma cruzi 12 animal 12