“…As shown in Table 1 , of the 63 studies retained for analysis, 14 were conducted in China ( 27 , 39 , 46 , 50 , 51 , 54 , 55 , 58 , 65 , 73 , 77 , 81 , 82 , 86 ), eight in the USA ( 26 , 28 , 34 , 38 , 56 , 76 , 78 , 83 ), six in Greece ( 37 , 43 , 47 , 49 , 58 , 64 ), six in Japan ( 29 – 31 , 41 , 42 , 44 ), six in Turkey ( 12 , 57 , 62 , 67 , 68 , 70 ), three in Italy ( 59 , 63 , 87 ), 3 in Brazil ( 45 , 53 , 72 ), three in Spain ( 36 , 60 , 71 ), two in Sweden ( 66 , 84 ), two in India ( 79 , 85 ), one in Ireland ( 32 ), one in Germany ( 35 ), one in Thailand ( 40 ), one in Finland ( 48 ), one in Canada ( 52 ), one in the UK ( 74 ), one in Croatia ( 80 ), one in Australia ( 33 ), one in Taiwan ( 69 ), and one in Belgium ( 75 ). With regard to ethnicity, 28 studies were performed with Caucasians ( 12 ,…”