Table 2.

Quality evaluation of original research.

Studies	Randomization method	Allocation concealment	Blind method	Loss to follow-up	Baseline comparability	Jadad score
Bai 2010 [27]	Random	Not described	Not described	Not described	No significant difference	1
Huang 2010 [28]	Random	Not described	Not described	Not described	No significant difference	1
Liu 2015 [29]	Random	Not described	Not described	Adverse reactions	No significant difference	2
Wang 2007 [30]	Random	Not described	Not described	Not described	No significant difference	1
Wang 2013 [31]	Random	Not described	Not described	Not described	No significant difference	1
Yang 2004 [32]	Random	Not described	Not described	Adverse reactions	No significant difference	2
Yu 2016 [33]	Random	Not described	Not described	Not described	No significant difference	1