Affiliation: | (1) National Surgical Adjuvant Breast and Bowel Project (NSABP), Pittsburgh, Pennsylvania 15212, USA;(2) NSABP Biostatistical Center, One sterling Plaza, 201 North Craig St., Pittsburgh, Pennsylvania 15212, USA;(3) Aultman Hospital, 2600 Sixth St., Sw, Canton, Ohio 14710, USA;(4) Allegheny General Hospital, 320 E. North Avenue, Pittsburgh, Pennsylvania 15212, USA;(5) NSABP, Four Allegheny Center-5th Floor, Pittsburgh, PA 15212, USA |