Family history, she says, is another important risk factor, because autoimmune diseases tend to run in families.

Each disease tends to run in families, but are the two conditions also linked?

If they are smokers, their disease tends to progress more quickly.

It might be inherited, because the disease tends to happen in families.

She said her husband was told that the disease tended to recur when patients were in their 40's.

Graves' disease and some other types tend to run in families, though the pattern of inheritance is not clear.

Hodgkin's disease tends to strike most often in two age groups: from 15 to 34 years and over 60.

The disease tends to return in areas that were previously not affected, and you may need surgery again.

According to health officials, fifth disease tends to occur in the spring and winter among children from 2 to 12 years old.

The disease does not tend to affect older trees.