“…8 ). The results showed that according to patients’ regional country, nine Asian studies 16 , 20 , 21 , 22 , 35 , 37 , 38 , 40 , 41 showed lower infection rates of 1.8% (95% CI 0.4%−3.2%), compared to Eight European studies 17 , 18 , 19 , 23 , 24 , 39 , 42 , 43 that showed an infection rate of 2.8% (95% CI 0.9%−4.8%) ( Fig. 9 ).…”