[1] Univ Calif Los Angeles, Geffen Sch Med, Los Angeles, CA USA
[2] Univ So Calif, Keck Sch Med, Los Angeles, CA USA
[3] Inst Nacl Carbon Enfermedades Neoplasicas, Lima, Peru
[4] Allama Iqbal Med Coll, Lahore, Pakistan
[5] GlaxoSmithKline Inc, Collegeville, PA USA
[6] Hosp Prato, Sandro Pitigliani Med Oncol Unit, Prato, Italy