Table 3.

Risk of bias of selected studies

Author	Random Sequence Generation	Allocation concealment	Binding of participants/ professionals	Blinding of outcome assessors	Incomplete outcomes	Relative outcome report	Other sources of bias
Gambarini et al. [ 28 ]	Low	Low	Low	Unclear	Low	Low	High
Gambarini et al. [ 29 ]	Low	Low	Low	Unclear	Unclear	Low	High
Neelakantan et al. [ 30 ]	Low	Low	Low	Unclear	Low	Low	Low
Nekoofar et al. [5]	Low	Low	Low	Unclear	Low	Low	High
Kherlakian et al. [18]	Low	Low	Low	Unclear	Unclear	Low	High
Krithikadatta et al. [31]	Low	Low	Low	Low	Low	Low	High
Pasqualini et al. [32]	Low	Low	Low	Low	Low	Low	High
Relvas et al. [33]	Low	Low	Low	Low	Low	Low	Low
Shokraneh et al. [34]	Low	Low	Low	Low	Low	Low	Low
Arslan et al. [ 36 ]	Low	Low	Low	High	Low	Low	High
Zand et al. [35]	Low	Unclear	Low	Low	Low	Low	High
Mollashahi et al. [ 37 ]	Low	Low	Low	Low	Low	Low	High
Çiçek et al. [38]	Low	Low	Low	Low	Low	Low	Low
Saha et al. [39]	Low	Low	Low	Low	Low	Low	Low
Oliveira et al. [40]	Low	Low	Low	Low	Low	Low	Low
Adiguzel et al. [41]	Low	Low	Low	Low	Low	Low	Low