Table 12.

Top 20 keywords by betweenness centrality.

Centrality	Keywords
0.85	Complications
0.8	Multicenter
0.69	Phase ii
0.67	Denosumab
0.57	Zoledronic acid
0.51	Radiosurgery
0.49	External beam radiotherapy
0.43	Radiofrequency ablation
0.43	Bisphosphonates
0.39	Stereotactic body radiotherapy
0.35	Skeletal metastases
0.33	Tumors
0.32	Quality of life
0.31	Disease
0.31	Skeletal related events
0.31	Surgery
0.31	Solid tumors