Treatment of oropharyngeal squamous cell carcinoma with IMRT: Patterns of failure after concurrent chemoradiotherapy and sequential therapy

D. J. Sher, V. Thotakura, T. A. Balboni, C. M. Norris, R. I. Haddad, M. R. Posner, J. Lorch, L. A. Goguen, D. J. Annino, R. B. Tishler