Table 2.

Quality assessments of the included studies

Ref.	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome	Incomplete outcome data	Selective reporting
Murray et al[18]	Mentioned, not described	Described	Mentioned, not described	Not mentioned	Completed	Not mentioned
Cheon et al[17]	Described	Described	Mentioned, not described	Mentioned, not described	Completed	Not mentioned
Sotoudehmanesh et al[9]	Mentioned, not described	Mentioned, not described	Mentioned, not described	Described	Completed	Not mentioned
Montaño Loza et al[19]	Mentioned, not described	Not mentioned	Not mentioned	Not mentioned	Completed	Not mentioned
Khoshbaten et al[16]	Mentioned, not described	Not mentioned	Mentioned, not described	Not mentioned	Completed	Not mentioned
Senol et al[15]	Mentioned, not described	Not mentioned	Not mentioned	Not, mentioned	Completed	Not mentioned
Elmunzer et al[14]	Mentioned, not described	Not mentioned	Described	Described	Completed	Not mentioned
Otsuka et al[5]	Mentioned, not described	Mentioned, not described	Not mentioned	Not mentioned	Completed	Not mentioned