Should Hypopharynx Cancer Continue to be Included in ‘Multi-head and Neck’ Trials within the RTOG? - Den, R.B.; Zhang, Q.; Cognetti, D.; Machtay, M.; Cooper, J.S.; Garden, A.S.; Jones, C.U.; Yom, S.; Ang, K.K. (International Journal of Radiation Oncology, Biology, Physics, 2010)