Table 1.

Search strategy

Step	String	Results
1	Exp Bone Neoplasms/sc OR Bone Neoplasms/rt OR [(boneCarcinoma/sc OR exp Neoplasm Metastasis/rt) AND exp “Bone and Bones”/] OR [(osseous OR skeletal) ADJ3 metastasis$] OR (bone ADJ3 metastasis$)	26956
2	Exp *Lung Neoplasms/OR exp Lung Neoplasms/pa OR lung cancer.mp	188189
3	Exp Radiotherapy/OR exp Dose Fractionation/OR exp Radiotherapy Dosage/	133052
4	Exp Palliative Care/OR exp Pain/RT OR Pain Management/mt OR (palliative OR palliation).mp OR painful adj3 metastasis$ OR (palliative$ ADJ3 radiotherapy).mp	94404
5	1 AND 2 AND 3 AND 4	88 Limit 10 yr: 28
6	1 AND 3 AND 4 Exclusion criteria: non-lung primary site cancers	608 Limit 10 yr: 256
7	(1 AND 4 AND radiotherapy.mp AND combined modality therapy/OR analgesics/OR treatment outcome/OR quality of life/OR exp Antineoplastic Combined Chemotherapy Protocols) NOT 6	129 Limit 10 yr: 50
8	Total	156