Which is the cellular target of gefitinib?
['Gefitinib, the specific inhibitor of the epidermal growth factor receptor (EGFR), may cause growth delay in cancer cell lines.', 'Gefitinib (Iressa) is a specific and effective epidermal growth factor receptor inhibitor.', 'Gefitinib is a specific inhibitor of the epidermal growth factor receptor (EGFR) that causes growth delay in cancer cell lines and human tumor xenografts expressing high levels of EGFR.']
['The specific cellular target of Gefitinib (Iressa) is the epidermal growth factor receptor (EGFR).']
['Epidermal growth factor receptor (EGFR)']