- Determine the antiangiogenic effects of PEG-interferon alfa-2b, in terms of pre- and post-treatment levels of microvessel density (MVD), endothelial cell apoptosis, vascular endothelial growth factor (VEGF), interleukin-8, basic fibroblast growth factor (bFGF), Nuclear Factor-KappaB (NF-KB), matrix metalloproteinase/MMP-9, and NF-KB in biopsy specimens, from patients with resectable stage II-IV squamous cell carcinoma of the head and neck.