In fact, 75% of all women with breast cancer have no known risk factors.

Age is the most important known risk factor for Alzheimer's disease.

There are no known risk factors that have been identified specific to the disease.

And, in any case, many of the women who get breast cancer don't fall into a known risk category.

Why would a parent do anything other than minimize every known risk to their baby's health?

This included several who had known risk factors, including concerns from their parents about possible hearing problems.

Most people with leukemia do not have known risk factors.

In fact, most children with leukemia don't have any known risk factors.

You are younger than 35 and have no known risk factors for Down syndrome or other problems.

It's a known risk that's already noted on drug labels.

"The weight gain itself is a known risk factor for diabetes."

However, there are a few known risk factors for this type of leukemia.

About the only known risk factor I escaped is being overweight.

Smoking alone is a known risk factor for some cancers.

None of the three, all women, was a member of any known risk group.

Half of all premature babies are born to women with no known risk factors.

There is no known risk in adding therapeutic touch to your medical treatment.

Most men who get testicular cancer don't have any known risk factors.

No known risk factors for him, maybe not for her, either.

Others will have diabetes, a known risk factor for cardiovascular disease.

However, the great majority of children with rhabdomyosarcoma do not have any known risk factors.

After a 10-week trial, the jury found his smoking, despite the known risks, a matter of free choice.

There are no known risk factors, except for having a family member who has a hereditary form of the disease.

But drinking alcohol may be more hazard than help to a woman who is free of the known risk factors for heart disease.

Can anyone among you confirm to me that they do not use a mobile phone in view of the known risks involved?