1. Northwest Metabolomics Research Center; Department of Anesthesiology and Pain Medicine; University of Washington; Seattle WA 98109 USA
2. Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation; East China University of Technology; Nanchang Jiangxi Province 330013 China
3. Division of Basic Sciences; Fred Hutchinson Cancer Research Center; Seattle WA 98109 USA
4. Department of Biochemistry; University of Washington; Seattle WA 98109 USA
5. Public Health Sciences Division; Fred Hutchinson Cancer Research Center; Seattle WA 98109 USA