[1] Natl Surg Adjuvant Breast & Bowel Project, Montreal, PQ, Canada
[2] Ctr Hosp Univ Montreal, Montreal, PQ, Canada
[3] NSABP Biostat Ctr, Pittsburgh, PA USA
[4] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Biostat, Pittsburgh, PA 15261 USA
[5] Natl Surg Adjuvant Breast & Bowel Project, Pittsburgh, PA USA
[6] Univ Pittsburgh, Inst Canc, Pittsburgh, PA USA
[7] Natl Surg Adjuvant Breast & Bowel Project, Dallas, TX USA
[8] Univ Texas SW Med Ctr Dallas, Dallas, TX 75390 USA
[9] Natl Surg Adjuvant Breast & Bowel Project, Denver, CO USA
[10] Kaiser Permanente, Denver, CO USA
[11] Natl Surg Adjuvant Breast & Bowel Project, Goldboro, NC USA
[12] SCCC CCOP, Goldboro, NC USA
[13] Natl Surg Adjuvant Breast & Bowel Project, Vallejo, CA USA
[14] Kaiser Permanente Northern Calif, Vallejo, CA USA
[15] Natl Surg Adjuvant Breast & Bowel Project, Richmond, VA USA
[16] Virginia Commonwealth Univ, Masey Canc Ctr, Richmond, VA USA
[17] Natl Surg Adjuvant Breast & Bowel Project, San Juan, PR USA
[18] CCOP San Juan, San Juan, PR USA
[19] Natl Surg Adjuvant Breast & Bowel Project, Columbus, OH USA
[20] CCOP Columbus, Columbus, OH USA
[21] McGill Univ, Jewish Gen Hosp, Segal Canc Ctr, Montreal, PQ H3T 1E2, Canada
[22] Ohio State Univ, Arthur G James Canc Hosp, Richard J Solous Res Inst, Columbus, OH 43210 USA
[23] Univ Pittsburgh, Magee Womens Hosp, Pittsburgh, PA 15213 USA
[24] McGill Univ, Ctr Hlth, Montreal, PQ, Canada
[25] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Biostat, NSABP Biostat Ctr, Pittsburgh, PA 15261 USA
[26] Natl Surg Adjuvant Breast & Bowel Project, Ctr Biostat, Pittsburgh, PA USA
[27] Natl Surg Adjuvant Breast & Bowel Project, Washington, DC USA
[28] MedStar Washington Hosp Ctr, Washington Canc Inst, Washington, DC USA
[29] Natl Surg Adjuvant Breast & Bowel Project, Canton, OH USA
[30] Aultman Hosp, Canton, OH USA
[31] Allegheny Gen Hosp, Allegheny Canc Ctr, Pittsburgh, PA 15212 USA