The disease usually occurs in women older than 30 who have had children.

The disease usually occurs in people ages 40 to 60.

The disease is considered to be rare and occurs in less than 1% of the human population.

Alzheimer's disease usually does not occur until people are over age 60.

Wilson's disease occurs in 1 to 4 per 100,000 people.

Usually, the later the disease occurs, the slower its course is.

This disease can occur at any age, but is most often seen in middle-aged women.

The disease occurs mostly in children between the ages of 2 and 10 years.

Many members of the public denied that such a disease could occur in their communities.

The disease rarely occurs in people younger than 25 years old.