<qa>  What is the name of the study that aims to evaluate if adding vertebroplastyThe study aims to evaluate if adding vertebroplasty to radiotherapy, in the treatment of spine metastasis from breast and prostate cancer, is preferable to radiotherapy alone. The investigators hypothesize that, by combining vertebral augmentation with cement and radiotherapy, they could achieve an enhancement in pain relief and level of activities, as well as a decrease in the side effects of multiple medications used for pain control. 