If you collect your urine anytime it suits you, the study staff will give you 3 plastic collection cups and 3 small tubes filled with a preservative solution. To collect your urine, you will fill the collection cup with urine up to the 100 mL line, add 1 of the small tubes of preservative to the cup within 10 minutes, and then mark on the container that this is your first morning urine. If possible, fill the other 2 collection cups, adding a tube of preservative to each as just described and mark them so the study doctor will know the time when you collected your urine. You will return the collection cups to the study staff at your next visit. Your study doctor or staff will give you more details, if needed.