1. Department of Melanoma Medical Oncology, Mass Spectrometry Core Facility, Department of Pathology, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77054, Department of Biochemistry II, Nagoya University School of Medicine, Tsurumai, Showa-ku, Nagoya 466-0065, Japan, Mass Spectrometry Resource, Division of Endocrinology, Diabetes, Metabolism, and Lipid Research, Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri 63110...