Before revision: In prisons Health effects Screen time, the amount of time using a device with a screen, has become an issue for mobile phones since the adaptation of smartphones.
After revision: In hospitals As of 2007, some hospitals had banned mobile devices due to a common misconception that their use would create significant electromagnetic interference.Rachel C. Vreeman, Aaron E. Carroll, "Medical Myths", The British Medical Journal (now called The BMJ) 335:1288 (December 20, 2007),In prisons Health effects Screen time, the amount of time using a device with a screen, has become an issue for mobile phones since the adaptation of smartphones.