The steps are the same for the inpatient and camp studies, except that during the inpatient study subjects will have an IV inserted and blood samples will be obtained every 1/2 hour overnight. They will also have 20-30 minutes of activity in the afternoon and evening. After 16 subjects have entered the inpatient study, their data will be sent to the DSMB (Data Safety Monitoring Board) for review. If the studies show that these studies have met our predefined safety criteria, and the DSMB approves, we will then conduct our outpatient studies.