“…Ten RCTs were published from 2011 to 2018 and originated from six countries: four RCTs were conducted in the United States (Calisi, 2017;Hersch et al, 2018;Klatt et al, 2012;Moody et al, 2013), two were in China (Fang & Li, 2015;Yang et al, 2018), also, two were in Iran (Motlagh et al, 2016;Yousefi et al, 2015), one in India (Singh & Jain, 2017), one in Israel (Moody et al, 2013) and one in Japan (Kubota et al, 2016).…”