article: "Head injury x-rays may actually be causing harm"

http://www.timesonline.co.uk/article...949384,00.html

"They report in the British Medical Journal that the more radiation the
boys were given before the age of 18 months, the lower their subsequent
intellectual level. Those given the highest doses were about half as
likely to attend high school and scored less well on intelligence tests
given when they were called up for national service at 18."