[1] NSABP, Pittsburgh, PA USA
[2] MD Anderson Canc Ctr Orlando, Pittsburgh, PA USA
[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 So Calif, Glendale, CA USA
[7] Mayo Clin, Rochester, MN USA
[8] Wayne State Univ, Karmanos Canc Inst, Detroit, MI USA
[9] Allegheny Gen Hosp, Pittsburgh, PA 15212 USA
[10] Univ Florida, Gainesville, FL USA
[11] NSABP, Newark, DE USA
[12] Christiana Care Hlth Syst, Helen F Graham Canc Ctr, Newark, DE USA
[13] Emory Univ, ECOG, Atlanta, GA 30322 USA
[14] Massachusetts Gen Hosp, Div Hematol & Oncol, Boston, MA 02114 USA
[15] Harvard Univ, Sch Med, Boston, MA USA
[16] Kaiser Permanente, Hayward, CA USA
[17] UPMC Canc Ctr, Greensburg, PA USA
[18] Missouri Valley Canc Consotrium, Omaha, NE USA
[19] Florida Canc Specialists, Sarasota, FL USA
[20] William Beaumont Hosp, Royal Oak, MI 48072 USA
[21] King Faisal Specialist Hosp & Res Ctr, Riyadh 11211, Saudi Arabia
[22] Univ Pittsburgh, Grad Sch Publ Hlth, NSABP Biostat Ctr, Pittsburgh, PA USA