“…Figure 6 shows the number of citations of the most mentioned goals, classified by category of study. [83], [47], [35], [42], [70], [71], [67], [39], [75], [62], [66], [49], [68], [69], [72], [51], [52], [59], [73], [74], [41], [44], [56], [54], [55], [53]…”