Table 3.

Summary of risk of bias of included studies.

Risk of bias of included studies	Study Design	Randomization	Allocation concealment	Masking of participants	Masking of outcome assessors	Incomplete outcome reporting	Selective reporting	Other bias
Mouton et al. [19]	RCT	unclear	high risk	unclear	unclear	low risk	low risk	low risk
Kandelman and Gagnon [20]	RCT	unclear	unclear	unclear	low risk	unclear	unclear	unclear
Simons et al. [21]	RCT	unclear	unclear	unclear	unclear	unclear	unclear	unclear
Wang et al. [22]	RCT	unclear	unclear	low risk	low risk	high risk	unclear	unclear
Haresaku et al. [23]	other	low risk	unclear	unclear	unclear	low risk	unclear	unclear
Al-Haboubi et al. [24]	RCT	high risk	unclear	unclear	low risk	high risk	unclear	unclear
Keukenmeester et al. [25]	RCT	low risk	unclear	low risk	low risk	unclear	unclear	low risk
Saheer et al. [26]	RCT	low risk	low risk	low risk	low risk	unclear	unclear	low risk