observational study

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Oral health treatment in patients due for surgery is associated with significantly lower rates of postoperative pneumonia and shorter hospital stays, per observational study in one Japanese hospital, suggesting it might reduce infection risk - EurekAlert!

A Kansas State University engineer recently published results from an observational study in support of a century-old theory that directly challenges the Big Bang theory

Mortality burden of liver cancer in China: an observational study from 2008 to 2020 - EurekAlert