fig1

Figure 1. The success rates of 28 studies in Asia versus the United States. We plotted the success rates reported in 28 studies, derived from the 2018 meta-analysis by Shaterian and colleagues. Linear regression in this case is not intended to suggest mathematically or statistically meaningful trends, but it demonstrates a simplified visual of the trend of success rates in Asian countries (China, Japan, Korea, Taiwan, and India) versus the United States