Comparative analysis for renal stereotactic body radiotherapy using Cyberknife, VMAT and proton therapy based treatment planning. - Baydoun, Atallah; Vapiwala, Neha; Ponsky, Lee E.; Awan, Musaddiq; Kassaee, Ali; Sutton, David; Podder, Tarun K.; Zhang, Yuxia; Dobbins, Donald; Muzic, Jr., Raymond F.; Traughber, Bryan; Machtay, Mitchell; et al. (Journal of Applied Clinical Medical Physics, 2018)