But researchers worry that those grafts may not provide lasting results and are awaiting data from large clinical trials comparing the two methods.

Nonetheless, researchers still worry about creating children with terrible defects.

He thinks that researchers should not worry about the effects of their findings, saying, "You're just supposed to tell your peers what you found.

Some researchers worry that the 60-year-old technology for vaccine production may be too slow to stop a major new yellow fever epidemic.

Despite their defiance, researchers attending the conference worried that the Government might still have the means to enforce its vision of a coding standard.

Most medicines are not studied in pregnant women, because researchers worry about how the medicines might affect the baby.

With the shortage of salmon, researchers also worry that the orcas could turn more heavily to bottom fish.

Given that fact, researchers had better worry a lot about what the Council is likely to recommend to the president.

In recent years, some researchers have worried that the widespread use of stock options has distorted the picture, making the sell-to-buy ratio artificially high.

Younger women have been excluded from studies because researchers worry that they could become pregnant and be harmed by experimental drugs.