Table 2.

Characteristics of the included randomized trials

Study (reference)	Publication year	Country	Number of subjects
Monici et al[35]	2010	Brazil	70
Luz et al[26]	2011	Brazil	83
Santos et al[34]	2011	Brazil	38
Lo et al[31]	2013	Taiwan	118
Stanley et al[30]	2014	United Kingdom	64
Chen et al[28]	2016	China	96
Holster et al[32]	2016	Netherlands	72
Mansour et al[27]	2017	Egypt	120
Lv et al[33]	2017	China	49
Hanif et al[29]	2017	Pakistan	60