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Biomedicine

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cancer cells

OXYGEN DEPRIVATION  Cancer cells (shown in blue) surround a blood vessel (red) in a mouse tumor. Cells on the tumor’s edge are dying, starved of oxygen. But treatments to starve tumors have come up short.

Ebola scorecard

EBOLA BY THE NUMBERS  Looking at some key risk factors may help health care workers triage Ebola patients.

gastric bypass

STOMACH SURGERY  Gastric bypass surgery reduces the size of the stomach and shortens the digestive path for food. While performed for weight loss, the procedure may also bring long-term remission of diabetes.

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