PARSPORT trial management group. Parotid-sparing intensity modulated versus conventional radiotherapy in head and neck cancer (PARSPORT): a phase 3 multicentre randomised controlled trial - Nutting, C M; Morden, J P; Harrington, K J; Urbano, T G; Bhide, S A; Clark, C; Miles, E A; Miah, A B; Newbold, K; Tanay, M; Adab, F; Jefferies, S J; Scrase, C; Yap, B K; A‘Hern, R P; Sydenham, M A; Emson, M; Hall, E (Lancet Oncol)