Survival Benefit and Efficacy of Gefitinib in Recurrent/ Metastatic Head and Neck Cancer - Rao, R. Ranga; Konnpal, Anil; Bansal, Lalit; Dhiman, Amit; Khatri, Sameer; Rawat, Shneh; Dewan, Ajay (Indian Journal of Medical and Paediatric Oncology, 2007)