Researchers will record whether the doctors find any areas within your mouth that may not appear completely normal. They will collect tissue samples of these abnormal areas using a brush biopsy. To perform an oral brush biopsy, the research will press a small brush against an area inside your mouth, and turn it 5-10 times. The areas that could be biopsied include your gums, tongue, the roof of your mouth, the bottom of your mouth, or the inside of your cheeks. Any cells collected from the inside of your mouth will be placed on slides to be studied by the study team.