214: Rectal DVH: is V40 GY< 55%A Relevant, Achievable Surrogate for Rectal Toxicity, and can it be Safely Omitted?. (September 2016) - Ghosh, Sheila; Koul, Rashmi; VanUytven, Eric; McCurdy, Boyd; Ong, Aldrich; Bashir, Bashir; Ahmed, Shahida; Chowdhury, Amitava; Kim, Julian; Dubey, Arbind