Table 2.

RoB2 for included RCTs.

	Randomization Process	Deviations from Intended Interventions	Missing Outcome Data	Measurement of the Outcome	Selection of the Reported Results	Overall
Hirokawa 2013 [9]
Sugawara 2018 [14]
Takayama 2019 [12]
Togo 2007 [15]
Wu 1998 [13]
Gupta 2021 [8]

Low risk Some concern High risk.