1 Department of Breast Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
2 Erasmus University Medical Center, Rotterdam, The Netherlands.
3 Department of Radiation Oncology and Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
4 Department of Health Services Research and Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
5 UCLA Medical Center, Los Angeles, CA, USA.
6 Department of Breast Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. khunt@mdanderson.org.