“…When selecting only studies about Apps (25 papers out of 57, 44%), a slightly different geographical distribution emerged (Figure 2). Asia was dominating the literature, with 13 articles [29,36,51,[53][54][55][56][57]59,62,63,65,66], while Europe focused [29,35,36,38,48,49] and Oceania focused [29,36,76,77,79,81] followed with six studies each.…”