The geographic areas of focus for each article analyzed
| Geographic focus | Studies |
|---|---|
| USA | Mullens et al. [20]; Egan et al. [21]; Tirrell et al. [23]; Nayyar et al. [26]; Chen et al. [27]; Kinney et al. [29]; Sorice et al. [37]; Timberlake et al. [38]; Bater et al. [33] |
| Saudi Arabia | Almajnoni et al. [30]; Sindi et al. [31]; Sayegh et al. [32]; Alhujayri et al. [39]; Alhusaini et al. [40]; Ateq et al. [46]; Alkhathami et al. [43] |
| Netherlands | de Vries et al. [24]; Hermans et al. [36] |
| Turkey | Çınar et al. [22]; Sonmez et al. [41] |
| United Kingdom | Zargaran et al. [28]; Walker et al. [34] |
| Italy | Gesto et al. [42]; Nerini et al. [45] |
| Australia | Seekis and Barker [44] |
| Canada | Dengre et al. [25] |
| Nigeria, Japan, Germany, and USA | Wallner et al. [18] |
| International | Ben-Naftali et al. [19] |