1. Department of Statistics, Rice University, Houston, TX
2. Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX
3. Department of Biostatistics, University of Michigan, Ann Arbor, MI
4. Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
5. Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
6. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX
7. Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX
8. Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, PA