Table 2. AMSTAR 2 assessment of the studies included .

Questions AMSTAR 2	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Mudano et al.20	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Yes	Yes	Yes
Lee et al.23	Yes	No	Yes	No	No	Yes	No	No	No	No	*	*	Yes	No	*	Yes
Macfarlane et al.21	Yes	No	Yes	Yes	Yes	No	No	Yes	No	No	*	*	No	No	*	Yes

*No meta-analysis conducted