Table 1.

General data of the included studies.

Study	Country	Published year	Study design	Age (year)	Sample size Ili/Sto	Follow-up time (month)
Mardian et al10	Germany	2015	Retrospective	57	56/44	12
Shazar et al11	Israel	2013	Retrospective	41.5 ± 15.4	122/103	12
Qiu et al13	China	2013	Retrospective	16–65	18/16	12
Shen et al16	China	2014	Retrospective	45.2/46.5	21/19	12
Xiong et al14	China	2015	RCT	41.2 ± 10.1	25/40	12
Xu et al15	China	2014	RCT	46.7 ± 12.4	20/18	12
Yuan et al17	China	2015	Retrospective	20–65	33/22	12
Zhang et al12	China	2015	RCT	30.27 ± 6.02	40/40	–