Table 2. Quality assessment of individual study.

Author	Year	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other
Schurch [41]	2005	low	low	low	low	low	low	unclear
Dmochowski [34]	2010	low	unclear	low	low	low	low	unclear
Cruz [33]	2011	low	low	low	low	low	low	unclear
Rovner [40]	2011	low	low	unclear	low	low	low	unclear
Denys [22]	2012	low	unclear	low	low	low	low	unclear
Ginsberg [36]	2012	low	low	low	low	low	low	unclear
Ginsberg [35]	2013	low	low	low	low	low	low	unclear
Nitti [38]	2013	low	low	unclear	low	low	low	unclear
Rovner [39]	2013	low	low	low	low	low	low	unclear
Kennelly [37]	2013	low	low	low	low	low	low	unclear
Abdelwahab [32]	2015	low	unclear	low	low	low	low	unclear