1. Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, Tennessee 37232-8340, Jim Ayers Institute for Precancer Detection and Diagnosis, Vanderbilt-Ingram Cancer Center, Nashville, Tennessee 37232-6350, Mass Spectrometry Research Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232-8575, Department of Biochemistry, Vanderbilt University Medical Center, Nashville, Tennessee 37232-0146, Buck Institute for Age Research, Novato, California 94945, Department...