[1] Univ Utah, Huntsman Canc Inst, Salt Lake City, UT USA
[2] Univ N Carolina, Sch Med, Chapel Hill, NC USA
[3] Hubert H Humphrey Canc Ctr, Robbinsdale, MN USA
[4] Mary Crowley Canc Res Ctr, Dallas, TX USA
[5] Univ Louisville, Louisville, KY 40292 USA
[6] Emory Univ, Dept Surg, Atlanta, GA 30322 USA
[7] Northern Calif Melanoma Ctr, San Francisco, CA USA
[8] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[9] Amgen Inc, Woburn, MA USA
[10] Amgen Inc, Dept Biostat & Epidemiol, San Francisco, CA USA
[11] Amgen Inc, Thousand Oaks, CA 91320 USA
[12] Rush Univ, Med Ctr, Chicago, IL 60612 USA