[1] Univ Texas MD Anderson Canc Ctr, Dept Melanoma Med Oncol, Houston, TX 77030 USA
[2] Mem Sloan Kettering Comprehens Canc Ctr, Human Oncol & Pathogenesis Program, New York, NY USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Syst Biol, Houston, TX 77030 USA
[4] Univ Calif San Francisco, Dept Dermatol & Pathol, Ctr Comprehens Canc, San Francisco, CA 94143 USA