[1] Brown Univ, Providence, RI 02912 USA
[2] Dana Farber Canc Inst, Boston, MA 02115 USA
[3] Duke Univ, Med Ctr, Alliance Stat & Data Ctr, Durham, NC USA
[4] Mem Sloan Kettering Canc Ctr, New York, NY 10021 USA
[5] Toledo Community Hosp, Oncol Program, Toledo, OH USA
[6] Hop Sacre Coeur, Montreal, PQ H4J 1C5, Canada
[7] Loyola Univ, Stritch Sch Med, Naperville, IL USA
[8] Northwestern Univ, Robert H Lurie Comprehens Canc Ctr, Chicago, IL 60611 USA
[9] Virginia Oncol Associates, Norfolk, VA USA
[10] Mission Hosp Inc, Southeast Canc Control Consortium, Asheville, NC USA
[11] Univ Chicago, Chicago, IL 60637 USA
[12] Univ Calif San Francisco, Ctr Comprehens Canc, San Francisco, CA 94143 USA
[13] Brigham & Womens Hosp, Dept Pathol, Boston, MA 02115 USA
[14] Harvard Univ, Sch Publ Hlth, Dept Nutr, Boston, MA 02115 USA
[15] Harvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115 USA
[16] Brigham & Womens Hosp, Dept Med, Channing Lab, Boston, MA USA
[17] Harvard Univ, Sch Med, Boston, MA USA