A retrospective study on clinical factors influencing intra-fraction motion using volumetric imaging for spine stereotactic body radiotherapy. - Venkataraman, Sankar; Abdalmassih, Michael; Hanumanthappa, Nikesh; Pareek, Vibhay; Kulshrestha, Rashi; Lambert, Pascal; Rathod, Srinivas; Butler, Jim; Dubey, Arbind (Journal of Radiosurgery & SBRT, 2022)