[1] UT SouthWestern Med Ctr, Dallas, TX USA
[2] Univ Texas MD Anderson Canc Ctr, Houston, TX USA
[3] Univ Houston MD Anderson Canc Ctr, Houston, TX USA
[4] Univ Texas MD Anderson Canc Ctr, Dept Biostat, Houston, TX USA
[5] MD Anderson Canc Ctr, Dept Breast Surg Oncol, Houston, TX USA