“…Nine studies (18.8%) included individuals with a mix of cancer types [ 71 – 79 ]. The studies were conducted in the United States (n = 13, 27.1%) [ 33 – 35 , 38 , 45 , 46 , 48 , 49 , 63 , 67 , 72 , 73 , 79 ], UK or Ireland (n = 11, 22.9%) [ 36 , 41 , 51 – 53 , 56 , 71 , 75 – 78 ], Canada (n = 7, 14.6%) [ 39 , 50 , 54 , 61 , 65 , 69 , 70 ], Taiwan (n = 4, 8.3%) [ 42 , 57 , 58 , 66 ], Sweden (n = 4, 8.3%) [ 32 , 55 , 60 , 74 ], China (n = 2, 4.2%) [ 37 , 68 ], and Germany (n = 2, 4.2%) [ 40 , 59 ]. The remaining five studies were conducted in Australia, Turkey, Thailand, Denmark, and Indonesia (each n = 1) [ 43 , 44 , 47 , 62 , 64 ].…”