People would pay about $3,000 to $5,000 for this exam if it was done in a doctor's office. If they participate in this survey, they get the results for free and have the opportunity to be part of a national study.

166

Because this is a scientific experiment, people are chosen based on very specific information. However, we haven't selected everybody yet, so someone could still get a letter in the next two weeks.

155

Everyone who comes through this study is kept confidential by law. When they walk through those doors, they become a number. We don't even know their names or addresses.

100