Table 2.

Quality of the literature.

Author Year	Random sequence generation	Allocation concealment	Blinding	Follow-up Visit	Complete Outcome data	Modified Jadad score
Çağla, Ö. 2015	Random-number sequence	Not mentioned	Unclear	Not mentioned	Yes	4
Celik, E.C 2013	Not mentioned	Not mentioned	Not mentioned	Not mentioned	Not mentioned	2
Vitalii, C 2014	Not mentioned	Not mentioned	Not mentioned	Not mentioned	Not mentioned	2
Xia B 2015	computer-generated random-number sequence	Yes	Not mentioned	Yes	Yes	5
Xiao-hong W 2011	random-number sequence	Not mentioned	Not mentioned	Not mentioned	Yes	4
Xue-qiang W 2009	Not mentioned	Not mentioned	Not mentioned	Not mentioned	Not mentioned	2