1. Department of Biostatistics and Bioinformatics Duke University Durham North Carolina 27710 USA
2. Duke Clinical and Translational Science Institute Duke University Durham North Carolina 27710 USA
3. Duke Center for AIDS Research Duke University Durham North Carolina 27710 USA
4. Center for Human Systems Immunology Duke University Medical Center Durham North Carolina 27710 USA
5. Center for Biostatistics and Health Data Science, Department of Statistics Virginia Tech Roanoke Virginia 24016 USA
6. Duke Cancer Institute Duke University Durham North Carolina 27710 USA