Population-based phase II trial of stereotactic ablative radiotherapy (SABR) for up to 5 oligometastases: SABR-5 oleh Robert Olson, Mitchell Liu, Alanah Bergman, Sonya Lam, Fred Hsu, Benjamin Mou, Tanya Berrang, Ante Mestrovic, Nick Chng, Derek Hyde, Quinn Matthews, Chad Lund, Daniel Glick, Howard Pai, Parminder Basran, Hannah Carolan, Boris Valev, Shilo Lefresene, Scott Tyldesley, Devin Schellenberg