“…Of the 48 studies, only 1 was a randomized controlled trial (RCT) [ 4 ]. Eight studies [ 54 , 56 , 58 , 59 , 72 , 76 , 79 , 80 , 85 ] were done in the United Kingdom (UN), 8 in the USA [ 21 , 44 , 52 , 55 , 64 , 73 , 74 , 88 ],11 in Japan [ 6 , 45 , 46 , 50 , 66 , 68 , 70 , 75 , 77 , 78 , 81 ], 7 in China [ 43 , 63 , 65 , 82 , 84 , 86 , 87 ], 4 in Australia [ 3 , 57 , 60 , 67 ],3 in Netherlands [ 4 , 47 , 71 ], and 2 in Italy [ 49 , 51 ], and the remaining studies were conducted in Germany [ 61 ], France [ 69 ], Chile [ 48 ], and Finland [ 83 ]. Key methodological characteristics are shown in Table 1 .…”