Study Random
sequence
generation 		Allocation
concealment 		Blinding Incomplete
outcome
data 		Selective
reporting 		Other bias Summary
assessment
Tallarico et al. [27] Low Low Low Low Low Low Low
Cardaropoli et al. [29] Low Unclear Unclear Low Low Low Unclear
Barone et al. [30] Unclear Low Low Low Low Low Low
Marconcini et al. [31] Low Low Unclear Low Low Unclear Low
Felice et al. [32] Low Unclear Unclear Low Low High Unclear
Esposito et al. [33] Low Low Low Low Low Unclear Low
Esposito et al. [34] Low High Low Low Low Unclear Low