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[Comment] Addressing overuse and underuse around the world

The benefits of modern medical care have advanced the health of populations around the world, but with better health has come rising health-care spending. Not surprisingly, there is global interest in optimising the delivery of health services, exemplified by the universal health coverage (UHC) and waste in research campaigns.1,2 Comparatively neglected is a central paradox that afflicts high-income countries (HICs) and low-income and middle-income countries (LMICs) alike: the failure to deliver needed services alongside the continuing delivery of unnecessary services.