Those in the control group will have serum measurements taken at the time points listed in the study activities table below. They will occupy themselves for the next 4.5 hours with activity options to keep them from sleeping during the study visit, such as reading magazines, crossword puzzles, or games. We will have these on hand, or they can bring them to the visit. At each time point, salivary cortisol, heart rate, blood pressure, and pain ratings will be assessed. At the end of the final blood draw, the IV catheter is removed and the first study visit is complete.