Here is a link to a research study that I participated in with the U of U. It basically consisted of a very lengthy telephone interview.
http://www.utahvoice.org/pageview.aspx?menu=5462&id=11915
If you are interested, click on the New research for risk factors at the top of the page.
The funny thing is that after seeing all of my mom's siblings together in the same room last week, I want to call the University and change my answers.