[1] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[2] UT MD Anderson Canc Ctr, Houston, TX USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Thorac Head & Neck Med Oncol, Houston, TX 77030 USA
[4] Inst Canc Estado Sao Paulo, Sao Paulo, Brazil
[5] Univ Texas MD Anderson Canc Ctr, Cambridge, Cambs, England