[1] Stanford Univ, Stanford, CA 94305 USA
[2] Univ Alabama Birmingham, Birmingham, AL USA
[3] Univ Rochester, Ctr Canc, Rochester, NY USA
[4] NCI, Bethesda, MD 20892 USA
[5] Mayo Clin, Rochester, MN USA
[6] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[7] Duke Univ, Med Ctr, Durham, NC USA
[8] Univ Washington, Seattle, WA 98195 USA
[9] Ohio State Univ, Columbus, OH 43210 USA