A number of other possible causes have been suspected, but not proven.

White was active in a number of charitable and community causes.

Lyons took on a number of causes in the 1910s and 1920s.

Together, they began to give to a number of charitable causes, often to help students who wanted to further their education.

Since then, money has been raised for a number of other local causes.

No reason had been given for excluding her, and there might be any number of causes.

"There are a number of causes which we continue to believe in and pursue," he said.

The southern violence appears to have a number of causes.

The patient is asked questions intended to narrow the number of potential causes.

Fever during treatment can be due to a number of causes.