National Institutes of Health Director Dr. Jay Bhattacharya said "it's hard to guarantee when science will make an advance."| www.cbsnews.com
"We are not creating an autism registry," a Department of Health and Human Services official said in a statement.| www.cbsnews.com
CDC experts were not made available to discuss the findings showing a rise in autism prevalence.| www.cbsnews.com
The autism study is planning to link confidential data "with broad coverage in the U.S. population" in one place for the first time.| www.cbsnews.com