TABLE 3.

Quality assessments of studies included in the meta-analysis

Author (Reference)	Randomization	Allocated concealment	Blinding	Follow-up (weeks)	Loss of follow-up	Dropout (T/C)	Quality grade*
Hung et al (23)	Adequate	Not used	Unclear	8	Not described	11/4	C
Zargar et al (22)	Adequate	Adequate	Adequate (double-blind)	6	Not described	0/0	A
Hsu et al (24)	Adequate	Adequate	Unclear	8	Not described	0/0	B
Jensen et al (25)	Adequate	Adequate	Adequate (double-blind)	4	Not described	10/13	A
Tsibouris et al (26)	Adequate	Adequate	Adequate (double-blind)	4	Not described	0/0	A

^*Based on reference 21; C Number of patients in control group; T Number of patients in treatment group