 Prior to a non-urgent PRBC transfusion, subjects will be randomized to either the NPO group or fed group of patients. The intervention will be the placement of a subject in the NPO group. Subjects will be made NPO for a total of 24 hours around the time of the PRBC transfusion. During the transfusion, both groups of subjects will have serum cytokine levels obtained at 3 time intervals- 1 4 hours pre-transfusion, 2 2-4 hours post-transfusion, and 3 20-24 hours post-transfusion. 