- Randomized trial on two types of thermoplastic masks for patient immobilization during radiation therapy for head-and-neck cancer: In regard to Sharp et al. (Int J Radiat Oncol Biol Phys 2005;61:250-256). Roques, T., Dagless, M., Tomes, J. Int. J. Radiat. Oncol. Biol. Phys. (2005)