Table 4.

The individual quality components of ROBIS of included SRs.

Included study	Phase 2				Phase 3
	1. Study eligibility criteria	2. Identification and selection of studies	3. Data collection and study appraisal	4. Synthesis and findings	Risk of bias in the review
Li [24] (2009)
Yan [19] (2015)
Yao [22] (2016)
Liang [41] (2016)
Chen [33] (2016)
An [38] (2016)
Luo [39] (2016)			?
Liu [35] (2017)
Pu [28] (2017)			?
Zhang [31] (2018)
Liang [32] (2018)
Zhu [21] (2018)					?
Li [37] (2018)			?
Wei [26] (2019)				?
Zhao [40] (2019)			?
Li [36] (2019)
Wu [29] (2019)
Zhao [30] (2019)			?
Yao [20] (2019)
Zhao [27] (2020)			?
Zhang [34] (2020)
Xiao [23] (2020)
Ke [25] (2021)

Note:  = low risk;  = high risk; ? = unclear risk.