EGFR and non-small cell lung carcinoma: Two ADCs (mAbE-21a and mAbE-21d) were evaluated in nude mice bearing human head and neck squamous cell carcinoma EGFR- + HSC-2 xenograft, as well as in nude mice bearing non-small-cell lung cancer (NSCLC) squamous cell H1703 xenograft (lower antigen expression).