Table 2.

Quality assessment of the included randomized controlled trials (RCTs)

Study ID	Generation of randomization Sequence	Allocation concealment	Blinding	Withdrawals	Total score
Arora 2011 [6]	1	2	1	1	4
Bartl 2014 [7]	2	2	0	1	5
Martinez-Mendez 2018 [9]	2	2	0	1	5
Saving 2019 [20]	2	2	0	1	5
SIRNIÖ 2019 [21]	2	2	0	1	5