Table 3. Quality assessment of the included studies.

Study No.	Author	Year	Bias arising from the randomization process	Bias caused by deviations from intended interventions	Bias caused by missing outcome data	Bias in measurement of the outcome	Bias in selection of the reported result	Overall bias
1	Aggarwal, et al. [35]	2010	+	?	+	+	+	?
2	Ghoddusi J, et al. [41]	2018	+	-	+	+	+	-
3	Saatchi M, et al. [42]	2018	+	+	+	+	+	+
4	Sharma R, et al. [43]	2018	+	-	+	-	+	-

Legend: +, Low risk of bias; ?, Some concerns; −, High risk of bias.