Affiliation: | 1. Leiden University Medical Center, Center for Proteomics and Metabolomics, Albinusdreef 2, 2300RC Leiden, the Netherlands;2. Molecular Microbial Physiology Group, Faculty of Science, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands;3. The Scripps Research Institute, Scripps Center for Metabolomics and Mass Spectrometry, La Jolla, CA, USA |