If you are in the standard care group, you will receive an indirect calorimetry test at the beginning of study, and you will submit 3-day food records every 2 weeks. You will not receive the results from these food records. Your health care provider may refer you to see a dietitian at any time during this study as part of your standard care. If at any time your caloric intake is considered to be 50% or less of your expected intake, your regular doctor will be notified.