“…In this review, we found a total of 30 studies (47% of the sample) resorting to WS. In terms of countries where the WS was employed, 10 studies were done in the USA [29,38,67,73,86,[88][89][90]93,104], 8 in Japan [78,79,81,92,94,95,105,106], 3 in South Korea [34,82,91], 3 in Canada [65,66,107], and 2 in Australia [31,97], while the following countries have only one study that used WS: China [30], Germany [108], Italy [68], Spain [96], and Taiwan [109]. Regarding the most common research topics, in recent years WS was employed more commonly in Public Health [29][30][31][66][67][68]73,78,79,105,107,109,110] and Socio-economic and Demographics [88][89]…”