The Advisory suggests certain measures to limit exposure to electromagnetic radiation emitted by the devices.
They include shortening the length of conversation to keeping the phones away from the head.
It also recommends children not use cell phones except in emergencies.
Dr. Herberman believes he is the first US cancer center director to release such an advisory.
Other cancer experts say there's nothing wrong with taking precautions, but they also stress that there is still no conclusive evidence tying cell phone use to brain cancer.
