1. Department of Radiation Oncology, Dana-Farber Cancer Institute and Brigham & Women's Hospital, Boston, MA, USA.
2. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA, USA.
3. Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA.
4. Department of Gynecologic Oncology, Dana-Farber Cancer Institute and Brigham & Women's Hospital, Boston, MA, USA.