Adjuvant radiotherapy after transoral laser microsurgery for advanced squamous carcinoma of the head and neck - Pradier, O; Christiansen, H; Schmidberger, H; Martin, A; Jäckel, M C; Steiner, W; Ambrosch, P; Kahler, E; Hess, C F (Int J Radiat Oncol Biol Phys, 2005)