“…Three studies were found from Iran [25,41,42], two from Japan [43,44], and one each from Canada [45], India [11], Taiwan [46], South Africa [47], Pakistan [48], and Samoa [49], respectively. There were 17 studies from European countries: Slovakia [12], Hungary [38], Bosnia and Herzegovina [22], Netherlands [50], United Kingdom [33,34], Sweden [39,[51][52][53][54][55], Spain [56], Finland [57,58], France [13,59], Italy [60,61], and Serbia [62]. These studies differed in design.…”