While you are on the study, if you report through the telephone system joint pain of a certain level of severity, a joint pain kit will be mailed to you along with a pre-addressed stamped envelope. Study staff will call you to let you know the kit is being mailed and that they can help you complete it, if needed. You will be asked to perform a self exam of your joints and to mark the area that is painful to you on the body drawing included in the kit. You will also answer some questions about your pain and about your medication and supplement use. You will be asked to return the completed kit to the project office in the pre-addressed stamped envelope included with the kit. This kit should be able to be completed in about 15 minutes.