PUBLIC MARKS from Newspartnergroup with tag "breast cancer"

Artificial illumination is fooling the body's biological clock into releasing key wakefulness hormones at the wrong times, contributing to seasonal fatigue and depression. And daylight-saving time, extended by Congress this year for an extra four weeks, risks dragging even more Americans into a winter funk.

The clinical trial will compare an ultrasonic scalpel with the traditional technique, called electrocautery, in which surgeons send a current of electricity through the tissues being cut. The tissues heat up because of their resistance to the current, and the heat collapses and seals blood vessels to prevent bleeding.