A dietitian will then set-up an appointment (within 3 days after your first visit to the ambulatory clinics) for a baseline test called indirect calorimetry. This test will be performed in your treatment room in the ambulatory treatment clinic to find out how many calories you need to have on a daily basis. For this test, you will be asked to sit quietly in your treatment room and breathe through a mouth piece with a nose clip on your nose for 10 minutes. This test will use a machine to collect the air that you breathe in (inhalation) and out (exhalation). The machine will use the information from your breathing to calculate how many calories you will need to intake each day. This entire process should take about 1 hour to complete. You will be given recommended levels of dietary caloric intake and your schedule for study activities within the first week of enrolling in this study. After this test, you will be randomized (as in the toss of a coin) to a group.