K. Margulis, , Z. Zhou, Q. Fang, R. E. Sievers, R. J. Lee, and R. N. Zare, “Combining Desorption Electrospray Ionization Mass Spectrometry Imaging and Machine Learning for Molecular Recognition of Myocardial Infarction,” Anal. Chem. 90, 12198-12206 (2018).