1. Department of Biological Chemistry, University of California, Los Angeles, California 90095, United States
2. UCLA Lipidomics Laboratory, University of California, Los Angeles, California 90095, United States
3. Department of Anesthesiology and Pain Medicine, Northwest Metabolomics Research Center, University of Washington, Seattle, Washington 98109, United States
4. Department of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California 90095, United States
5. Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, United States
6. SCIEX, Redwood City, California 94065, United States
7. Center for Proteomics and Metabolomics, Leiden University Medical Center, 2333ZA Leiden, Netherlands