Quantifying the changes in the tumour vascular micro-environment in spinal metastases treated with stereotactic body radiotherapy - a single arm prospective study oleh Vellayappan Balamurugan, Cheong Dennis, Singbal Salil, Tey Jeremy, Yang Soon Yu, Nang Leong Cheng, Wong Alvin, Lwin Sein, Hung Lee Chau, Periasamy Pravin, Lo Simon, Kumar Naresh