“…In total 17 studies were excluded for analysis because they did not meet the inclusion criteria (5 studies) [11], [19], [20], [21], [22], or contained data already published in another paper (6 studies) [8], [23], [24], [25], [26], [27] or consisted of reviews instead of original data (5 studies) [3], [5], [28], [29], [30] or could not be retrieved (1 study). This led to a total number of 50 studies to be included into the study [4], [6], [7], [9], [10], [12], [13], [17], [18], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64], [65], [66], …”