Complete restoration of refractory mandibular osteoradionecrosis by prolonged treatment with a pentoxifylline-tocopherol-clodronate combination (PENTOCLO): a phase II trial - Delanian, S; Chatel, C; Porcher, R; Depondt, J; Lefaix, J L (Int J Radiat Oncol Biol Phys, 2011)