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IMRT : Evolution or Revolution?
Propensity score-based comparison of long-term outcomes with 3-dimensional conformal
radiotherapy vs intensity-modulated radiotherapy for esophageal cancer.
Int J Radiat Oncol Biol Phys. 2012 Dec 1;84(5):1078-85. doi: 10.1016/j.ijrobp.2012.02.015.