1. Affiliations of authors: Department of Translational Molecular Pathology (SB, NC, SSe, AMK) and Department of Biostatistics (SL, JJL), The University of Texas M. D. Anderson Cancer Center, Houston, TX; Fred Hutchison Cancer Research Center, Seattle, WA (YH, TM); Department of Epidemiology (JC, MLF), University of Maryland Medical Center (SAS, DK), Baltimore, MD; University of Pittsburgh Medical Center, Pittsburgh, PA (R