Dose Escalation with Simultaneous Integrated Boost (SIB) Using Volumetric Modulated Arc Therapy (VMAT) in Rectal Cancer. - Alsuhaibani, Abdullah; Elashwah, Ahmed; Mahmood, Rana; Abduljabbar, Alaa; Alhomoud, Samar; Ashari, Luai; Bazarbashi, Shouki; Aljubran, Ali; Alzahrani, Ahmed; Mohiuddin, Muhamed; Almanea, Hadeel; Alhussaini, Hussah; et al. (Journal of gastrointestinal cancer, 2019)