[1] Chinese Univ Hong Kong, Dept Clin Oncol, Hong Kong, Hong Kong, Peoples R China
[2] Osped Civile, Ist Toscano Tumori, Livorno, Italy
[3] Rocky Mt Canc Ctr, Med Oncol, Denver, CO USA
[4] Lung Clin Grosshansdorf, Dept Thorac Oncol, Grosshansdorf, Germany
[5] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[6] Genentech Inc, Clin Sci, San Francisco, CA 94080 USA
[7] Genentech Inc, Biostat, San Francisco, CA 94080 USA
[8] Univ Pittsburgh, Med Ctr, Div Hematol Oncol, Pittsburgh, PA USA