Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Duke Cancer Institute, Duke University Medical Center, Durham, NC, USA. Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA. Department of BioHealth Informatics, Indiana University-Purdue University, Indianapolis, IN, USA. Alliance Statistics and Data Center, Duke University, Durham, NC, USA. Levine Cancer Institute, Charlotte, NC, USA. College of Pharmacy, University of Michigan, Ann Arbor, MI, USA. Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, FL, USA. Dana Farber Cancer Institute, Boston, MA, USA. Department of Medicine, Hematology/Oncology, University of California at San Francisco, San Francisco, CA, USA. University of Chicago Comprehensive Cancer Center, Chicago, IL, USA. Department of Medical Oncology, Yale School of Medicine, New Haven, CT, USA. Department of Bioengineering and Therapeutic Sciences, University of California at San Francisco, San Francisco, CA, USA. Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, NC, USA. Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. innocent@email.unc.edu.