Hospitals and policymakers routinely face a difficult question when investing in specialized emergency services: Will adding another facility improve care, or would those resources do more good somewhere else? New UC San Francisco research suggests the answer depends heavily on what people already have access to. In nearly 600,000 California heart attack patients, survival rates improved after specialized services opened in communities that previously lacked timely access. But where those services were already available, opening another facility increased the likelihood of receiving procedures only slightly and did not improve survival rates.

A recent study from Johns Hopkins Medicine reveals that both the liver and brain contribute pathways to differing symptoms of the same rare inherited disorder.

Millions of Americans use cannabis products as sleep aids, but a new Northwestern Medicine study suggests marijuana may not improve sleep the way many people believe it does. 

The study found both lifetime and recent cannabis use were associated with poorer objectively measured sleep quality, even though participants generally did not perceive their sleep to be worse.