Efficacy and safety of combining bevacizumab and fractionated stereotactic radiotherapy for extensive brain metastases in patients with non-small cell lung cancer: a prospective phase II study (GASTO-1053). Read more about Efficacy and safety of combining bevacizumab and fractionated stereotactic radiotherapy for extensive brain metastases in patients with non-small cell lung cancer: a prospective phase II study (GASTO-1053).