In 2005, when government scientists tested 60 soft, vinyl lunch boxes, they found that one in five contained amounts of lead that medical experts consider unsafe — and several had more than 10 times hazardous levels.

But that's not what they told the public.

The documents describe two types of tests done on 60 lunch bags in 2005: One involves analyzing how much lead is in a chunk of vinyl; the second test involves swiping the surface of a bag and then determining how much lead has rubbed off.

The results of the first type of test found that one in five contained amounts of lead medical experts consider unsafe. But the C-P-S-C didn't use those results. Instead, it focused exclusively the swipe test. A C-P-S-C spokeswoman says it was more realistic, more closely reflecting how one would interact with a lunch box.

Scientists have unveiled results of the largest study of the genetics of autism, involving DNA from almost 1,200 affected families worldwide. Two key clues have already been isolated.

Discoveries in two areas of the genome -- a region on chromosome 11 suspected of having links to autism, and aberrations in a brain-development gene called neurexin 1 -- could spur more targeted research, the experts noted.