International comparisons of health outcomes are challenging. These challenges arise not from extrapolating the effect of various treatments on human biology, which is geographically consistent, but from interpreting the impact of highly variable behavioral and policy differences on that biology.

中文翻译：

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最好的移植策略？这取决于。

健康结果的国际比较具有挑战性。这些挑战不是来自于推断各种治疗对人类生物学的影响，这在地理上是一致的，而是来自于解释高度可变的行为和政策差异对该生物学的影响。