[1] Natl Surg Adjuvant Breast & Bowel Project, Vallejo, CA USA
[2] Kaiser Permanente Calif, Vallejo, CA USA
[3] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Biostat, Pittsburgh, PA 15261 USA
[4] NSABP, Pittsburgh, PA USA
[5] Univ Pittsburgh, Inst Canc, Pittsburgh, PA USA
[6] Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA
[7] Univ Calif Los Angeles, Jonsson Comprehens Canc Ctr, Div Canc Prevent & Control Res, Los Angeles, CA 90024 USA
[8] NSABP Biostat Ctr, Pittsburgh, PA USA
[9] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Biostat, Natl Surg Adjuvant Breast & Bowel Project,Biostat, Pittsburgh, PA 15261 USA
[10] NSABP, Washington, DC USA
[11] MedStar Washington Hosp Ctr, Washington Canc Inst, Washington, DC USA
[12] MD Anderson Canc Ctr Orlando, Orlando, FL USA
[13] Allegheny Gen Hosp, Natl Surg Adjuvant Breast & Bowel Project, Pittsburgh, PA 15212 USA
[14] Allegheny Gen Hosp, Allegheny Canc Ctr, Pittsburgh, PA 15212 USA