 On testing day, a nursephlebotomist will insert a small needle attached to a plastic tube called a catheter into a vein in the hand or arm. This procedure will allow the nursephlebotomist to collect the 4 blood samples over the 3-hour testing period. The needle stick may cause some temporary pain and may result in a black and blue mark. A device that automatically takes blood pressure will then be put on the opposite arm. The subject will also be given water to sip on during the duration of testing. Before testing begins, the subject be instructed to take their last dose of medication. During the first 10 minute baseline rest period, they will relax in a reclining chair. They can listen to music, read a book or magazine or watch movies to pass the time. Blood pressure will be taken before and after this 10 minute rest period. Once the baseline rest period is over, a blood and urine sample will be collected. 