Some people do not develop symptoms until 20 or more years later.

More than 70 percent develop symptoms by about 40 years of age.

Sometimes the way family members handle problems makes them more likely to develop symptoms.

The fact that he'd seen five of the patients just before he developed symptoms had to be significant.

After you develop symptoms, they may not become severe for another 3 to 10 years.

Those at higher risk might start taking drugs before they develop symptoms.

A child may develop serious symptoms suddenly, so it is important to pay attention to your child's behavior every day.

Did they know anyone else who had developed similar symptoms?

It can be hard to watch a family member or friend develop symptoms and perhaps act in very different ways.

Two years later, the researchers followed up and found that 328 had developed symptoms.