TABLE 4.

Methodological quality of included human studies (RoB-2 tool).

Study ID	Randomization process	Assignment to intervention	Adhering to intervention	Missing outcome data	Measurement of outcome	Selection of the reported result	RoB-2 overall score
Arintaya Phrommintikul. 2019	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Naser Aslanabadi. 2019	Low risk	Some concerns	Low risk	Some concerns	Low risk	Some concerns	Some concerns
Wanwarang Wongcharoen. 2012	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Wanwarang Wongcharoen. 2011	Some concerns	Low risk	Low risk	Low risk	Low risk	Some concerns	Some concerns