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Al-Hallaq HA, Chmura SJ, Salama JK, Leif JL, McNulty S, Galvin JM, Followill DS, Robinson CG, White JR, Xiao Y, Matuszak MM. Benchmark Credentialing Results for the First Multiple Metastases SBRT Protocol: NRG BR001. International Journal of Radiation Oncology*Biology*Physics. Elsevier BV; 2015. p. S85–S86.