Table 1.

Summary of selected studies

	Study	Adult Patients with LGG (n)	Level of Evidence	Quality Evaluation (Newcastle-Ottawa Scale)
1	Tanriverdi, 201636	40	IV	☆☆☆☆☆☆
2	Duffau, 201629	16	II	☆☆☆☆☆☆☆
3	Meguins, 201534	65	IV	☆☆☆☆☆☆
4	Lima, 20152	21	II	☆☆☆☆☆☆
5	Pallud, 20149	988	IV	☆☆☆☆☆
6	Kemerdere, 201415	35	IV	☆☆☆☆☆
7	Ius, 201431	52	IV	☆☆☆☆☆☆
8	Yuan, 201341	93	IV	☆☆☆☆☆☆
9	You, 201339	54	IV	☆☆☆☆☆☆
10	Wilden, 201338	7	IV	☆☆☆☆☆☆
11	Schucht, 201335	64	III	☆☆☆☆☆☆
12	You, Sha, 2012b19	508	IV	☆☆☆☆☆
13	You, Huang, 201240	183	IV	☆☆☆☆☆
14	Ghareeb, 201230	15	IV	☆☆☆☆☆☆☆
15	Chang, 200827	332	IV	☆☆☆☆☆☆
16	Bauer, 200726	6	IV	☆☆☆☆☆☆
17	Choi, 200428	16	IV	☆☆☆☆☆☆☆
18	Zaatreh, 200442	43	IV	☆☆☆☆☆☆☆
19	Luyken, 200320	50	IV	☆☆☆☆☆☆
20	Duffau, 20023	11	IV	☆☆☆☆☆☆☆
21	Wennberg, 199937	7	IV	☆☆☆☆☆☆☆
22	Lombardi, 199733	22	IV	☆☆☆
23	Jooma, 199532	14	IV	☆☆☆☆☆☆☆