Study Year of
publication 		Random
sequence
generation 		Allocation
concealment 		Blinding of
participants and
personnel 		Blinding of
outcome
assessment 		Incomplete
outcome
data 		Selective
reporting 		Quality
Pang et al. [31] 2017 ? + + + + + Low risk
Santos et al. [33] 2021 + + + + + - Low risk

? = unclear; + = yes; - = no.