Tumor resensitization to erlotinib following brief substitution of cetuximab. <a href="http://www.ncbi.nlm.nih.gov/pubmed/18283460?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum" target="_blank">http://www.ncbi.nlm.nih.gov/pubmed/18283460?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum</a> biophud