“…In one trial, pfs was longer in the egfr inhibitor group: 4.57 months for erlotinib versus 2.53 months for vinorelbine (hr: 0.6444; 95% ci: 0.4325 to 0.9601; p = 0.0308) 21 . In five trials, pfs was longer in the chemotherapy group 13,15,17,19,20 . Several of the trials found that pfs significantly favoured chemotherapy 13,15,19 .…”