Chemoradiation therapy with or without salvage surgery for early squamous cell carcinoma of the hypopharynx - Nakamura, K; Shioyama, Y; Saski, T; Ohga, S; Saku, M; Urashima, Y; Yoshitake, T; Nakashima, T; Kuratomi, Y; Komune, S; Terashima, H; Honda, H (Int J Radiat Oncol Biol Phys, 2005)