[1] Dana Farber Canc Inst, Boston, MA 02115 USA
[2] Fox Chase Canc Ctr, Philadelphia, PA 19111 USA
[3] Univ Minnesota, Mason Canc Ctr, Minneapolis, MN USA
[4] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[5] Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA
[6] Pfizer Oncol, San Diego, CA USA
[7] Merck Res Labs, N Wales, PA USA
[8] Georgetown Lombardi Comprehens Canc Ctr, Washington, DC USA